This project is part of the State of Ohio Portal.=

About the Project

Please use this project to add, research, document, and discuss your ancestors from Ohio. You can add profiles for:

• People born in Ohio
• People who lived in Ohio
• People who died in Ohio

When you find helpful resources for research, please share them here so that others can benefit.

If you have projects related specifically to Ohio, like projects for towns or families centered within the county, you can also add those.

If you have any questions, suggestions, or general thoughts to share, please use the "Discussions" link at the upper right corner of the page.

County listing

Ohio Counties and County Seats

• Adams County - West Union
• Allen County - Lima
• Ashland County - Ashland
• Ashtabula County - Jefferson
• Athens County - Athens
• Auglaize County - Wapakoneta
• Belmont County - Saint Clairsville
• Brown County - Georgetown
• Butler County - Hamilton
• Carroll County - Carrollton
• Champaign County - Urbana
• Clark County - Springfield
• Clermont County - Batavia
• Clinton County - Wilmington
• Columbiana County - Lisbon
• Coshocton County - Coshocton
• Crawford County - Bucyrus
• Cuyahoga County - Cleveland
• Darke County - Greenville
• Defiance County - Defiance
• Delaware County - Delaware
• Erie County - Sandusky
• Fairfield County - Lancaster
• Fayette County - Washington Court House
• Franklin County - Columbus
• Fulton County - Wauseon
• Gallia County - Gallipolis
• Geauga County - Chardon
• Greene County - Xenia
• Guernsey County - Cambridge
• Hamilton County - Cincinnati
• Hancock County - Findlay
• Hardin County - Kenton
• Harrison County - Cadiz
• Henry County - Napoleon
• Highland County - Hillsboro
• Hocking County - Logan
• Holmes County - Millersburg
• Huron County - Norwalk
• Jackson County - Jackson
• Jefferson County - Steubenville
• Knox County - Mount Vernon
• Lake County - Painesville
• Lawrence County - Ironton Licking County - Newark
• Logan County - Bellefontaine
• Lorain County - Elyria
• Lucas County - Toledo
• Madison County - London
• Mahoning County - Youngstown
• Marion County - Marion
• Medina County - Medina
• Meigs County - Pomeroy
• Mercer County - Celina
• Miami County - Troy
• Monroe County - Woodsfield
• Montgomery County - Dayton
• Morgan County - McConnelsville
• Morrow County - Mount Gilead
• Muskingum County - Zanesville
• Noble County - Caldwell
• Ottawa County - Port Clinton
• Paulding County - Paulding
• Perry County - New Lexington
• Pickaway County - Circleville
• Pike County - Waverly
• Portage County - Ravenna
• Preble County - Eaton
• Putnam County - Ottawa
• Richland County - Mansfield
• Ross County - Chillicothe
• Sandusky County - Fremont
• Scioto County - Portsmouth
• Seneca County - Tiffin
• Shelby County - Sidney
• Stark County - Canton
• Summit County - Akron
• Trumbull County - Warren
• Tuscarawas County - New Philadelphia
• Union County - Marysville
• Van Wert County - Van Wert
• Vinton County - McArthur
• Warren County - Lebanon
• Washington County - Marietta
• Wayne County - Wooster
• Williams County - Bryan
• Wood County - Bowling Green
• Wyandot County - Upper Sandusky

Source: http://geology.com/county-map/ohio.shtml