The Ohio Genealogical Society is the largest state genealogical society in the United States. It focuses on acquiring, preserving, and sharing the genealogy and history of the people of Ohio.
Online Collections free to the public
Lineage Societies
Settlers and Builders of Ohio Roster
Society Of Civil War Families of Ohio (SCWFO)
Military
Names of Union Soldiers with Civil War Service in Ohio Units
Ohio’s Revolutionary War Veterans Index
World War I 83rd Division Personal Information Cards Index
OGS Indexes
Whissemore Photograph Collection
OGS Journal Indexes
Ohio Civil War Genealogy Journal – Subject Index
Ohio Civil War Genealogy Journal – Surname Index
Ohio Civil War Genealogy Journal – TOC Index
ORPF & OGQ Civil War Subject Index
County-Specific Databases
Warren County
Warren County Naturalization Index
Warren County Obituary Index 1810 to 2012
Warren County Ohio Estate Principal Index 1803 to 1931
Warren County Ohio Guardianships 1803-1916
Warren County Ohio Record of Accounts 1901 to 1948
OGS Chapters
Allen County Chapter, OGS
Ashland County Chapter, OGS
Ashtabula County Chapter, OGS
Athens County Chapter, OGS
Auglaize County Chapter, OGS
Belmont County Chapter, OGS
Brown County Chapter, OGS
Butler County Chapter, OGS
Carroll County Chapter, OGS
Clark County Chapter, OGS
Clermont County Chapter, OGS
Clinton County Chapter, OGS
Columbiana County Chapter, OGS
Coshocton County Chapter, OGS
Crawford County Chapter, OGS
Cuyahoga Valley Chapter, OGS
Cuyahoga West Chapter, OGS
Darke County Chapter, OGS
Defiance County Chapter, OGS
Delaware County Chapter, OGS
East Cuyahoga Chapter, OGS
Fairfield County Chapter, OGS
Fayette County Chapter, OGS
Florida Chapter, OGS
Franklin County Chapter, OGS
Fulton County Chapter, OGS
Gallia County Chapter, OGS
Geauga County Chapter, OGS
Greater Cleveland Chapter, OGS
Greene County Chapter, OGS
Guernsey County Chapter, OGS
Hamilton County Chapter, OGS
Hancock County Chapter, OGS
Hardin County Chapter, OGS
Harrison County Chapter, OGS
Henry County Chapter, OGS
Highland County
Hocking County Chapter, OGS
Holmes County Chapter, OGS
Hudson Genealogical Study Group
Huron County Chapter OGS (DBA) Firelands Genealogical Society
Jackson County Chapter, OGS
Jefferson County Chapter, OGS
Knox County Chapter, OGS
Lake County Chapter, OGS
Lawrence County Chapter, OGS
Licking County Chapter, OGS
Logan County Chapter, OGS
Lorain County Chapter, OGS
Lucas County Chapter, OGS
Madison County Chapter, OGS
Mahoning County Chapter, OGS
Marion Area Chapter, OGS
Medina County Chapter, OGS
Meigs County Chapter, OGS
Mercer County Chapter, OGS
Miami County Historical and Genealogical Society
Monroe County Chapter, OGS
Montgomery County Chapter, OGS
Morgan County Chapter, OGS
Morrow County Chapter, OGS
Muskingum County Chapter, OGS
Noble County Chapter, OGS
Ottawa County Chapter, OGS
Paulding County Chapter, OGS
Perry County Chapter, OGS
Pickaway County Chapter, OGS
Pike County Chapter, OGS
Portage County Chapter, OGS
Richland County Chapter, OGS
Richland-Shelby Chapter, OGS
Ross County Chapter, OGS
Sandusky County Chapter, OGS
Scioto County Chapter, OGS
Seneca County Chapter, OGS
Shelby County Chapter, OGS
Southern Ohio Chapter of Highland County, OGS
Stark County Chapter, OGS
Summit County Chapter, OGS
Trumbull County Chapter, OGS
Tuscarawas County Chapter, OGS
Union County Chapter, OGS
Vinton County Chapter, OGS
Warren County Chapter, OGS
Washington County Chapter, OGS
Wayne County Chapter, OGS
Williams County Chapter, OGS
Wood County Chapter, OGS
Wyandot County Chapter, OGS
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