Colorado Tax Records online include property tax books, real estate and land tax records, sales tax records, military poll tax records, and more. This is a preliminary list.

TIP – Login with your free FamilySearch account to unlock some collections — see other tips for opening FS resources.

KEY to collections

• FS=FamilySearch FREE but login with your free account to access
• Anc$=Ancestry – fee site
• MH=MyHeritage – fee site
• DPL – Denver Public Library
• FGS – Foothills Genelogical Society
• GTHG – Genealogy Trails History Group
• IA – Internet Archive
• KMW – Karen Mitchell Websites
• MGC – Montrose Genealogy Center
• RW – RootsWeb

US Tax Records online for Colorado

Colorado – Internal revenue lists for the territory of Colorado, 1862-1866

Colorado – Colorado Tax Assessment Lists 1862 – 1866, at DPL

Colorado Tax Records online by County

Arapahoe County – Taxation – Assessment Rolls, 1897, at FS

Arapahoe County – Taxation – Block and Lot Books for Denver, 1873, at FS

Arapahoe County – Taxation – Military Poll Tax Warrants, Arapahoe County, 1899, at FS

Arapahoe County – Taxation – Record of Tax Sales, Town Lots and Land, at FS

Denver County – Taxation – Block and Lot Books for Denver, 1873, at FS

Denver County – Taxation – Inheritance Tax Records, 1910-1942, at FS

Denver County – Taxation – Record of Tax Sales, Town Lots and Land, at FS

El Paso County – Taxation – Tax Records, 1877-1899, at FS

Huerfano County – Taxation – Huerfano County 1873 Tax Records, at KMW

Huerfano County – Taxation – Huerfano County Inheritance Tax Records 1910-1946, at KMW

Lake County – Taxation – Assessment Rolls, 1879-1900, at FS

Park County – Tax Assessment Rolls – 1876 Index, at FGS

Pitkin County – Taxation – Block and Lot Books, 1896-1923, at FS

Pitkin County – Taxation – Land Book 1895-1896, at FS

Pitkin County – Taxation – Special Index, at FS

Pitkin County – Taxation – Tax Records, 1894, at FS

Pitkin County – Taxation – Voting Registers, 1900-1901, at FS

Colorado Tax Records online by City

Aspen – Taxation – Block and Lot Books, 1896-1923, at FS

Denver – Taxation – Block and Lot Books for Denver, 1873, at FS

Montrose – Taxation – Tax Lists 1883-1887, at MGC