Illinois Naturalization records online and Illinois Citizenship Records online may include declarations of intent, petitions for naturalization, oaths of allegiance, certificates of citizenship, and more.
These records often provide names and aliases of a person, age, country of birth, ethnic background, date and port of arrival, the name of the ship, previous residences, or current address.
You can look at federal (1870-1920) and state census (1825-1925) records to see if your ancestor was naturalized. See Illinois Census Records online for census record links and other helpful sources. Also see Illinois Emigration and Immigration Records online.
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Illinois Naturalization Records online at the federal and state level
US – United States, New England Petitions for Naturalization Index, 1791-1906, index & images
US – U.S. Naturalization Records, at MH – $
US – see Naturalization Records at US Genealogy Records Online at MyHeritage, at MH – $
Illinois – Illinois, Northern District (Eastern Division), Naturalization Index, 1926-1979, index & images
Illinois – Illinois, Northern District Naturalization Index, 1840-1950, index & images
Illinois – Illinois, Northern District Petitions for Naturalization, 1906-1994, index & images
Illinois – Illinois, County Naturalization Records, 1800-1998, index & images
Illinois – Illinois, Northern District (Eastern Division), Naturalization Index, 1926-1979, at MH – $
Illinois Naturalization Records online at the county level
Adams County – Naturalization and Citizenship – Circuit Court Records, Vol. B, 1826-1844, at FS
Adams County – Naturalization and Citizenship – Naturalization and Related Records, 1840-1943, at FS
Adams County – Naturalization and Citizenship – Naturalization Related Papers, Cases 1-414, Ca. 1830-1918, at FS
Alexander County – Naturalization and Citizenship – Record of Declarations of Intention, 1910, 1921-1929; List (index) to 1941, at FS
Bond County – Naturalization and Citizenship – Naturalization Records, 1806-ca 1906, at FS
Brown County – Naturalization and Citizenship – Naturalizations, Declarations of Intention & Petitions, 1857-1948, at FS
Bureau County – Naturalization and Citizenship – Bureau County, Illinois Naturalization Records, 1837-1908, at FS
Bureau County – Naturalization and Citizenship – Illinois, Bureau County, Naturalization Records, 1907-1954, at FS
Calhoun County – Naturalization and Citizenship – Calhoun County, Illinois Naturalizations Including Declarations of Intention and Petitions, 1849-1926, at FS
Calhoun County – Naturalization and Citizenship – Naturalization Records, 1849-1926, at FS
Calhoun County – Naturalization and Citizenship – Naturalization Records, 1866-1906, at FS
Cass County – Naturalization and Citizenship – Cass County, Illinois Naturalization Records, Ca. 1837-1921, at FS
Champaign County – Naturalization and Citizenship – Champaign County Naturalization Certificates, at UFL
Champaign County – Naturalization and Citizenship – Naturalization Records, 1858-1906, at FS
Champaign County – Naturalization and Citizenship – Naturalization Records, 1860-1906, at FS
Christian County – Naturalization and Citizenship – Christian County, Illinois Naturalization Records, 1857-1903, at FS
Christian County – Naturalization and Citizenship – Christian County, Illinois Naturalization Records, 1866-1903, 1907 (1), 1912 (1), 1914 (1), at FS
Christian County – Naturalization and Citizenship – Probate Journal, 1839-1886, at FS
Clay County – Naturalization and Citizenship – Naturalization Records, 1868-1904, at FS
Clay County – Naturalization and Citizenship – Naturalization Records, 1907-1927, at FS
Clinton County – Naturalization and Citizenship – Naturalization Records, 1857-1904, at FS
Coles County – Naturalization and Citizenship – Naturalization Records, 1872-1946, at FS
Coles County – Naturalization and Citizenship – Naturalization Records, 1892-1906, at FS
Cook County – Naturalization and Citizenship – Illinois, Northern District Petitions for Naturalization : COLLECTION RECORD, 1906-1994, at FS
Cook County – Naturalization and Citizenship – Illinois, Northern District, Chicago Division, Petitions for Naturalization, 1906-1994, at FS
De Witt County – Naturalization and Citizenship – Illinois, De Witt County Naturalization Records, 1866-1903, at FS
DeKalb County – Naturalization and Citizenship – Illinois, DeKalb County, Probate Records, Ca. 1837-1972, at FS
DeKalb County – Naturalization and Citizenship – Naturalization Records of DeKalb County, Illinois, at FS
Douglas County – Naturalization and Citizenship – Naturalization Records, 1860-1906, at FS
Edgar County – Naturalization and Citizenship – Naturalization Records, 1872-1908, at FS
Edwards County – Naturalization and Citizenship – Naturalization Records, 1865-1885, at FS
Edwards County – Naturalization and Citizenship – Naturalization Records, 1878-1902, at FS
Edwards County – Naturalization and Citizenship – Naturalization Records, Ca. 1819-1902, at FS
Edwards County – Naturalization and Citizenship – Naturalizations, Ca. 1819-1915, at FS
Effingham County – Naturalization and Citizenship – Naturalization Records, at FS
Effingham County – Naturalization and Citizenship – Naturalization Records, 1859-1892, at FS
Fayette County – Naturalization and Citizenship – Naturalization Records, 1866-1905, at FS
Ford County – Naturalization and Citizenship – Naturalization Records, 1859-1906, at FS
Franklin County – Naturalization and Citizenship – Naturalization Records, 1886-1909, at FS
Fulton County – Naturalization and Citizenship – Naturalization Records, 1859-1954, at FS
Gallatin County – Naturalization and Citizenship – Naturalization Records : Intentions, Vol. A, 1859-1893; Final Papers, Vol. A, 1859-1888; Soldiers & Minors, Vol. B, 1881-1953; Papers, Box 112, 1802-1906, at FS
Greene County – Naturalization and Citizenship – Naturalization Records, 1860-1906, at FS
Hamilton County – Naturalization and Citizenship – Naturalization Record, Vol. A, 1880-1900, at FS
Hamilton County – Naturalization and Citizenship – Naturalization Records, Intentions and Final Papers, 1824-1883, Index, 1824-1860, Hamilton County, Illinois, at FS
Hancock County – Naturalization and Citizenship – Naturalization Records, 1851-1930, at FS
Henderson County – Naturalization and Citizenship – Naturalization Records, 1856-1944, at FS
Henderson County – Naturalization and Citizenship – Naturalization Records, 1857-1906, at FS
Henry County – Naturalization and Citizenship – Naturalization Index Cards, at FS
Henry County – Naturalization and Citizenship – Naturalization Index Cards, at FS
Henry County – Naturalization and Citizenship – Naturalization Index Cards, 1910-1955, at FS
Henry County – Naturalization and Citizenship – Naturalization Records, 1856-1954, at FS
Henry County – Naturalization and Citizenship – Naturalization Records, 1862-1906, at FS
Henry County – Naturalization and Citizenship – Naturalization Records, 1910-1937, at FS
Iroquois County – Naturalization and Citizenship – Naturalization Records, 1859-1906, at FS
Iroquois County – Naturalization and Citizenship – Index of Petitions for Naturalizations 1867 – 1931, at ICGS
Iroquois County – Naturalization and Citizenship – Alphabetical listing of persons who became naturalized citizens, at ICGS
Jackson County – Naturalization and Citizenship – Naturalization Records : Final Papers, 1859-1892, at FS
Jackson County – Naturalization and Citizenship – Naturalization Records, 1868-1906, at FS
Jasper County – Naturalization and Citizenship – Naturalization Records, 1869-1906, at FS
Jersey County – Naturalization and Citizenship – Naturalization Records, 1854-1905, at FS
Jersey County – Naturalization and Citizenship – Naturalization Records, 1859-1905, at FS
Jo Daviess County – Naturalization and Citizenship – Declarations of Intent, Petitions for Naturalization, Naturalizations, 1856-1929, at FS
Kane County – Naturalization and Citizenship – Naturalization Records, 1846-1951, at FS
Kane County – Naturalization and Citizenship – Naturalization Records, 1858-1954, at FS
Kane County – Naturalization and Citizenship – Naturalization Records, 1872-1906, at FS
Kankakee County – Naturalization and Citizenship – Kankakee County, Illinois Naturalization, Declaration & Petition Records, Ca. 1854-1955, at FS
Knox County – Naturalization and Citizenship – [Naturalization : Record of Declaration of Intention, January 1907-April 1912, Knox County, Illinois], at FS
Knox County – Naturalization and Citizenship – [Naturalization : Record of Declaration of Intention, January 1907-April 1912, Knox County, Illinois], at FS
Knox County – Naturalization and Citizenship – [Naturalization : Record of Declaration of Intention, January 1907-April 1912, Knox County, Illinois], at FS
Knox County – Naturalization and Citizenship – [Naturalization Record of Declaration of Intention : January 1907-April 1912, Knox County, Illinois], at FS
Knox County – Naturalization and Citizenship – Declaration of Intention, at FS
Knox County – Naturalization and Citizenship – Declaration of Intention, at FS
Knox County – Naturalization and Citizenship – Declaration of Intention, at FS
Knox County – Naturalization and Citizenship – Naturalization : Record of Declaration of Intention. Volume 1 Number 1-300 Jan. 1907-April 1912, at FS
Knox County – Naturalization and Citizenship – Naturalization : Record of Declaration of Intention. Volume 1 Number 1-300 Jan. 1907-April 1912, at FS
Knox County – Naturalization and Citizenship – Naturalization : Record of Declaration of Intention. Volume 1, Numbers 1-300, Jan. 1907-April 1912, at FS
Knox County – Naturalization and Citizenship – Naturalization : Record of Declaration of Intention. Volume 1, Numbers 1-300, Jan. 1907-April 1912, at FS
Knox County – Naturalization and Citizenship – Naturalization : Record of Declaration of Intention. Volume 1, Numbers 1-300, January 1907-April 1912, Knox County, Illinois, at FS
Knox County – Naturalization and Citizenship – Naturalization Record of Declaration of Intention : January 1907-April 1912, Knox County, Illinois, at FS
Knox County – Naturalization and Citizenship – Naturalization Record of Declaration of Intention, January 1907-April 1912. Volume One– Numbers 1-300, Knox County, Illinois, at FS
Knox County – Naturalization and Citizenship – Naturalization Record of Declaration of Intention. Volume 1, Numbers 1-300, January 1907-April 1912, Knox County, Illinois, at FS
Knox County – Naturalization and Citizenship – Naturalization Record, 1856-1906 ; Naturalization Index Cards, 1800-1906, at FS
Knox County – Naturalization and Citizenship – Naturalization Record, 1863-1906, Naturalization Papers, 1861-1906, Naturalization Index Cards, 1800-1906, at FS
Knox County – Naturalization and Citizenship – Naturalization Records of Declaration of Intention, at FS
Knox County – Naturalization and Citizenship – Naturalization Records, Knox County, Illinois 1856-1861, at FS
LaSalle County – Naturalization and Citizenship – La Salle County, Illinois Declarations of Intention and Petitions for Naturalization, 1906-1980, at FS
LaSalle County – Naturalization and Citizenship – La Salle County, Illinois Naturalizations & Related Records, 1865-1906, at FS
LaSalle County – Naturalization and Citizenship – La Salle County, Illinois Naturalization Index Cards, Ca. 1840-1945, at FS
LaSalle County – Naturalization and Citizenship – Naturalizations and Declarations of Intention, 1840-1876, at FS
Lee County – Naturalization and Citizenship – Illinois, Lee County Records : COLLECTION RECORD, 1830-1954, at FS
Lee County – Naturalization and Citizenship – Illinois, Lee County, Naturalization Records, 1842-1929, at FS
Livingston County – Naturalization and Citizenship – Naturalization Records, 1854-1906, at FS
Logan County – Naturalization and Citizenship – Naturalization Records, 1859-1906, at FS
Macon County – Naturalization and Citizenship – Naturalization Record, at FS
Macon County – Naturalization and Citizenship – Naturalization Records, 1858-1883, at FS
Macon County – Naturalization and Citizenship – Naturalization Records, 1860-1906, at FS
Macoupin County – Naturalization and Citizenship – Naturalization Related Material, 1849-1887, at FS
Madison County – Naturalization and Citizenship – Illinois, Madison County, Naturalization Records, Ca 1840-1929, at FS
Madison County – Naturalization and Citizenship – Naturalization and Intentions of Madison County, Illinois : an Index, 1816-1900, at FS
Marion County – Naturalization and Citizenship – Naturalization Records, 1862-1906, at FS
Marion County – Naturalization and Citizenship – Naturalization Records, 1865-1906, at FS
Mason County – Naturalization and Citizenship – Naturalization Records, 1859-1906, at FS
Mason County – Naturalization Records – Mason County Naturalization Records, at GTHG
Massac County – Naturalization and Citizenship – Naturalization Record, Intentions and Final Papers, Vol. A, 1862-1904, at FS
McHenry County – Naturalization and Citizenship – Declarations of Intentions Index, 1851-1872, at FS
McHenry County – Naturalization and Citizenship – Naturalization Papers, 1851-1955, at FS
McHenry County – Naturalization and Citizenship – Naturalization Papers, 1858-1929, at FS
Menard County – Naturalization and Citizenship – Naturalization Records, 1859-1909, at FS
Menard County – Naturalization Records – Menard County Naturalization Records, at GTHG
Mercer County – Naturalization and Citizenship – Illinois, Mercer County, Naturalization Records, 1852-1940, at FS
Monroe County – Naturalization and Citizenship – Monroe County, Ill., Naturalization Records, 1854-1906, at FS
Montgomery County – Naturalization and Citizenship – Naturalization Records, 1862-1910, at FS
Montgomery County – Naturalization Records – Montgomery County Naturalization Index, at MCGS
Morgan County – Naturalization and Citizenship – Naturalization Records, 1835-1884, at FS
Moultrie County – Naturalization and Citizenship – Naturalization Records, 1871-1929, at FS
Ogle County – Naturalization and Citizenship – Naturalization Records, Ca. 1839-1929, at FS
Ogle County – Naturalization and Citizenship – Ogle County Naturalization Papers, 1839-1887, at FS
Ogle County – Naturalization Records – Ogle County Naturalization Papers (County Court) Index (1872-1906), at IRAD-NIU
Ogle County – Naturalization and Citizenship – Ogle County, Illinois Naturalization Papers, 1872-1888, 1890-1906, at FS
Perry County – Naturalization and Citizenship – Naturalization Declarations of Intention, Petitions, Final Oaths, 1856-1909, at FS
Perry County – Naturalization and Citizenship – Naturalization Declarations, Petitions & Final Oaths, 1845-1885, at FS
Perry County – Naturalization and Citizenship – Naturalization Records, 1860-1906, at FS
Piatt County – Naturalization and Citizenship – Naturalization Records, 1858-1884, at FS
Piatt County – Naturalization and Citizenship – Naturalization Records, 1862-1906, at FS
Pike County – Naturalization and Citizenship – Naturalization Records, 1848-1894, at FS
Pope County – Naturalization and Citizenship – Naturalization Records, 1864-1898, at FS
Pope County – Naturalization and Citizenship – Record of Aliens Naturalized, 1820-1821, at FS
Pulaski County – Naturalization and Citizenship – Naturalization Record, 1877-1900, at FS
Putnam County – Naturalization and Citizenship – Illinois, Putnam County, Naturalization Records, 1836-1944, at FS
Randolph County – Naturalization and Citizenship – Naturalization Records, 1865-1900, at FS
Randolph County – Naturalization and Citizenship – Naturalization Records, 1865-1906, at FS
Richland County – Naturalization and Citizenship – Naturalization Records, Ca. 1847-1888, Richland County, Illinois, at FS
Rock Island County – Naturalization and Citizenship – Military Petitions for Naturalizations, 1918, at FS
Rock Island County – Naturalization and Citizenship – Naturalization Records, 1851-1906 ; Index to Naturalizations, 1851-1962, at FS
Sangamon County – Naturalization and Citizenship – Sangamon County, Illinois Naturalization Records, 1874-1906, at FS
Schuyler County – Naturalization and Citizenship – Naturalization Records, 1867-1893, at FS
Schuyler County – Naturalization and Citizenship – Schuyler County Naturalization Papers, 1828-1880, at FS
Scott County – Naturalization and Citizenship – Naturalization Records, 1859-1906, at FS
Shelby County – Naturalization and Citizenship – Naturalization Records, 1858-1895, and Docket, 1874-1888, at FS
Shelby County – Naturalization and Citizenship – Naturalization Records, Vol. B, 1, 1876-1882, 1904-1906, at FS
St. Clair County – Naturalization and Citizenship – St. Clair County, Illinois Naturalization Papers, Surnames Beginning with “G,” 1855-1861, at FS
St. Clair County – Naturalization and Citizenship – St. Clair County, Illinois Petitions for Naturalization Records, 1906-1945, at FS
St. Clair County – Naturalization Records – Courts including Circuit Court index and Naturalizations, at SCCGS, at SCCGS
Stark County – Naturalization and Citizenship – Illinois, Stark County, Circuit Court Naturalization Records : COLLECTION RECORD, 1892-1913, at FS
Stark County – Naturalization and Citizenship – Illinois, Stark County, Circuit Court Naturalization Records, 1892-1913, at FS
Stark County – Naturalization and Citizenship – Illinois, Stark County, Circuit Court Naturalization Records : COLLECTION RECORD, 1892-1913, index links to images
Stark County – Naturalization and Citizenship – Illinois, Stark County, Circuit Court Naturalization Records, 1892-1913, at FS
Stark County – Naturalization and Citizenship – Naturalization Records, 1851-1906, at FS
Stark County – Naturalization and Citizenship – Illinois, Stark County, Circuit Court Naturalization Records, 1892-1913, index links to images
Tazewell County – Naturalization and Citizenship – Tazewell County, Illinois Naturalization and Immigration Records, 1839-1909 : Compiled by Christal E. Dagit ; Copied and Proofread by Christal Dagit . . . [et Al.], at FS
Tazewell County – Naturalization and Citizenship – Tazewell County, Illinois Naturalization Papers, 1856-1906–declarations of Intent; Minors’ Petitions & Declars.; Soldiers’ Declars. & Final Oaths; Final Oaths, at FS
Tazewell County – Naturalization and Citizenship – Tazewell County, Illinois Naturalization Records, 1839-1906, at FS
Union County – Naturalization and Citizenship – Naturalization Records, 1860-1904, at FS
Vermilion County – Naturalization and Citizenship – Naturalization Records, 1860-1903, at FS
Warren County – Naturalization and Citizenship – Index to Naturalizations, 1858-1943, at FS
Warren County – Naturalization and Citizenship – Naturalization Records, 1860-1906, at FS
Warren County – Naturalization and Citizenship – Petition and Naturalization Record, 1916-1929, at FS
Warren County – Naturalization and Citizenship – Petition, Affidavit of Witnesses, Final Oath and Certificate, 1903-1906, 1921, at FS
Warren County – Naturalization and Citizenship – Warren County, Illinois Naturalization Records : Books A, B & C & Vol. II, 1902-1929, at FS
Wayne County – Naturalization and Citizenship – Naturialization Records 1868-1927, Wayne County, Illinois, at FS
White County – Naturalization and Citizenship – Naturalization Record : Final Papers, Vol. A, 1860-1898, at FS
White County – Naturalization and Citizenship – White County, Ill. Wills, 1816-1916 : Also Obituaries Copied from Carmi Democrat-tribune. Other Items Also Included: White County, Illinois, Naturalization Papers; Marriages in 1916, at FS
Whiteside County – Naturalization and Citizenship – Index to Naturalization Records of Whiteside County, Ill., at FS
Whiteside County – Naturalization and Citizenship – Index to Whiteside County, Illinois Naturalization Documents from Sterling Court 1 July 1910 Through 21 February 1945, at FS
Williamson County – Naturalization and Citizenship – Naturalization Records, 1865-1903, at FS
Woodford County – Naturalization and Citizenship – Naturalization Papers, 1855-1906, at FS
Woodford County – Naturalization and Citizenship – Naturalization Records, 1861-1901, at FS
Woodford County – Naturalization and Citizenship – Naturalization Records, 1867-1906, at FS
Woodford County – Naturalization Records – Woodford County Wills & Probate Records online, at GTHG
Illinois Naturalization Records online at the city level
Alton – Naturalization and Citizenship – Naturalization Records, 1859-1906, at FS
Aurora – Naturalization and Citizenship – Naturalization Records, 1857-1931, at FS
Calumet City – Naturalization and Citizenship – Calumet City, Illinois Index to Naturalization Related Records, Ca. 1922-1954, at FS
Canton – Naturalization and Citizenship – Naturalization Records, 1859-1954, at FS
Chicago – Naturalization and Citizenship – Illinois, Cook County, Chicago, Certificate of Naturalization Stubs, 1907-1926, at FS
Chicago – Naturalization and Citizenship – Illinois, Cook County, Chicago, Naturalization Depositions, 1906-1912, at FS
Chicago Heights – Naturalization and Citizenship – Chicago Heights, Illinois Indexes to Petitions for Naturalization, 1907-1929, Declarations of Intention, 1910-1942, at FS
Du Quoin – Naturalization and Citizenship – Petitions for Naturalization, 1920-1925, at FS
East St. Louis – Naturalization and Citizenship – East St. Louis, Illinois Declarations of Intention, Petitions and Final Papers, 1903-1950; Indexes, 1874-1906, at FS
East St. Louis City – Court Records – East St. Louis City Court Naturalization Papers Index (1874–1906), at IRAD-SIU
Elgin – Naturalization and Citizenship – Naturalization Records, 1858-1954, at FS
Kewanee – Naturalization and Citizenship – Naturalization Index Cards, 1910-1955, at FS
Kewanee – Naturalization and Citizenship – Naturalization Records, 1910-1937, at FS
La Salle – Naturalization and Citizenship – Naturalization Records, 1875-1879, at FS
Mattoon – Naturalization and Citizenship – Petitions & Certificates of Naturalization, 1908-1927, at FS
Peoria – Naturalization and Citizenship – Declarations of Intention, 1907-1936 ; Petitions for Naturalization, 1908-1930 ; Index, 1905-1954, at FS
Peoria – Naturalization and Citizenship – Illinois, Naturalization Records, at FS
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