If you are researching in Ohio, you will find many good Ohio sites. At the OHGen Web Project, you can post queries with many of the Ohio counties. Included here are sites for researching and sites for general information.

Map of Ohio Counties
Ohio Genealogy Society
Ohio Historical Society
Ohio Vital Records Information
Ohio Government Websites
Ohio Memory Project
Ohio Paths: Genealogy Links to Ohio Counties
128th Ohio General Assembly
Ohio River Valley Families
Ohio Civil War Rosters
Ohio Railroad Stations Past & Present
Western Reserve Historical Society
Lake Erie Islands Historical Society
Rutherford B. Hayes Presidential Library
City of Massillon Ohio Page
Medina, OH, High School Class of 1900
OHGenWeb
Ohio Newspapers
The Buckeye Trail
Bowling Green State University, Bowling Green, Ohio
Mount Union College, Alliance, Ohio
Muskingum College, New Concord, Ohio
Ohio State University, Columbus, Ohio
Ohio University, Athens, Ohio
The University of Akron, Akron, Ohio