Search both the the computer and card catalogs for local histories, vital records, etc. under the name of the county as subject heading. Other important materials may also be found under subject heading listings for cities and towns, especially large urban areas and county seats. The following general sources may also be helpful:
Bell, Carol Willsy. Ohio wills and estates to 1850: an index. Columbus: Author, 1981.
Call #: oF490.B45 (LFH open shelf).
Ohio surname index. An index to biographical sketches in Ohio county histories. Consisting of approximately 450,000 entries, the original card file index from which this is reproduced is at the Ohio Historical Society. The Newberry holds the vast majority of books indexed in this source.
Call #: Microfilm 1166 (also indicate surnames being researched on your call slip).
Powell, Esther W. Early Ohio tax records. Akron, Ohio: Compiler, 1971.
Call #: oF490.P68 (LFH open shelf). Also index volume.
Ohio Death Records 1913-1937. An index maintained by the Ohio Historical Society.
Ohio, the cross road of our nation: records and pioneer families (Ohio Genealogical Society). 1960-1985.
Call #: oF490.O39 (LFH open shelf).
Report (Ohio Genealogical Society). 1961-.
Call #: oF486.R45 (LFH open shelf).
Bell, Carol Willsey. Ohio guide to genealogical sources. Baltimore: Genealogical Publishing Co., 1988. Call #: oZ1323.B453 (LFH open shelf).
Smith, Maxine H. Ohio cemeteries. Mansfield, Ohio: Ohio Genealogical Society, 1978.
Call #: oF490.O3618 1978 (LFH open shelf).
Roster of Ohio soldiers in the War of 1812. Columbus, Ohio: Adjutant General, 1916.
Call #: oE359.5O2 O3 1916 (LFH open shelf). Two separately published indexes shelved following this volume.
Official roster of the soldiers of the state of Ohio in the War of the Rebellion 1861-1866. Ohio Roster Commission, 1886-93. (Volumes 11 & 12 wanting.)
Call #: oE525.3 O38 (LFH open shelf). Index available (call #: Microfilm 1167).
The Official roster of Ohio soldiers, sailors and marines in the World War, 1917-18. Columbus, Ohio: Adjutant General, 1926-1929.
Call #: Microfiche 2249. Entries alphabetical for entire state, regardless of unit. Nativity information included.
Berry, Ellen T. and David A. Early Ohio settlers: purchasers of land in southwestern Ohio, 1800-1840. Baltimore: Genealogical Publishing Co., 1986.
Call #: oF490.B48 (LFH open shelf).
Early Ohio settlers: purchasers of land in east and east central Ohio, 1800-1840. Baltimore: Genealogical Publishing Co., 1989.
Call #: oF490.B466 (LFH open shelf).
Early Ohio settlers: purchasers of land in southeastern Ohio, 1800-1840. Baltimore: Genealogical Publishing Co., 1984.
Call #: oF490.B47 (LFH open shelf).
Smith, Clifford N. Federal land series: a calendar of archival materials on the land patents issued by the United States government . . . . Chicago: American Library Association, 1972-1986.
Call #: oKF5675.A73S6 (LFH open shelf).
Ohio Historical Society. Land grant records, 1788-1820.
Call #: Microfilm 312.
Seven reels of microfilm containing original land office records from Chillicothe (1801-1811); Cincinnati (1801-1806); Steubenville (1788-1812); and Zanesville (1812-1820). Use in conjunction with: Maybert Riegel, Early Ohioans' residences from the land grant records (Mansfield, Ohio: Ohio Genealogical Society, 1976).
Call #: oF490.R54 (LFH open shelf).
Newberry census holdings complete 1820-1880 (1800 & 1810 not extant). Published statewide indexes for all those years except 1870. 1880 soundex plus 1890 census for Civil War veterans and widows also available. Obtain census microfilm at 2nd floor reference post.