4th Regiment, Ohio Cavalry
The 4th Regiment, Ohio Cavalry was mustered in August to November, 1861 at Cincinnati, Lima, St. Maryes and Camp Dennison, Ohio. They were mustered out July 15, 1865 at Nashville, Tennessee. 
For more information on the history of this unit, see;
- Larry Stevens' Ohio in the Civil War, 4th Ohio Cavalry
- The Civil War Archive section, 4th Regiment Cavalry, (accessed 23 August 2012).
Companies in this Regiment with the Counties of Origin
Men often enlisted in a company recruited in the counties where they lived though not always. After many battles, companies might be combined because so many men were killed or wounded. However if you are unsure which company your ancestor was in, try the company recruited in his county first.
The ten companies were raised in Cincinnati and its "vicinity--Hamilton, Dayton, Lebanon, South Charleston, Ironton, Lima and St. Marys."
Field and Staff Officers - See roster.
Regimental band - See roster.
Company A - See roster.
Company B - See roster.
Company C - See roster.
Company D - See roster.
Company E - See roster.
Company F - See roster.
Company G - See roster.
Company H - See roster.
Company I - See roster.
Company K - See roster.
Company L - See roster.
Company M - See roster.
Unassigned recruits - See roster.
The rosters in The Story of the Fourth also have remarks about the men, such as information about captures, transfers, deaths, etc.
A county listing from Steve Ward's Buckeyes All, Part I Revised, is given on Larry Stevens' Ohio in the Civil War web page, 4th Ohio Cavalry.
- Beginning United States Civil War Research gives steps for finding information about a Civil War soldier. It covers the major records that should be used. Additional records are described in ‘Ohio in the Civil War’ and ‘United States Civil War, 1861 to 1865’ (see below).
- National Park Service, The Civil War Soldiers and Sailors System, is searchable by soldier's name and state. It contains basic facts about soldiers on both sides of the Civil War, a list of regiments, descriptions of significant battles, sources of the information, and suggestions for where to find additional information.
- Ohio in the Civil War describes many Confederate and Union sources, specifically for Ohio, and how to find them.. These include compiled service records, pension records, rosters, cemetery records, Internet databases, published books, etc.
- United States Civil War, 1861 to 1865 describes and explains United States and Confederate States records, rather than state records, and how to find them. These include veterans’ censuses, compiled service records, pension records, rosters, cemetery records, Internet databases, published books, etc.
- Aston, Howard.History and roster of the fourth and fifth independent battalions and thirteenth regiment Ohio cavalry volunteers. (Columbus, Ohio : Filmed by the Ohio Historical Society, 1988) FHL Film 1688760 Item 18
- Wulsin, Lucien; Adams, Eleanor N. The story of the Fourth Regiment Ohio Veteran Volunteer Cavalry : from the organization of the regiment, August, 1861, to its 50th anniversary, August, 1911. (Cincinnati, Ohio : [s.n.], 1912) FHL Book 977.178 M2w and (Bethesda, Maryland : University Publications of America, c1993) FHL Fiche 6118115
- Wulsin, Lucien.Roster of the surviving members of the Fourth Regiment Ohio Volunteer Cavalry, 1861-1865 : with a brief historical sketch of the regiment. (Bethesda, Maryland : University Publications of America, c1993) FHL Fiche 6118114