4th Regiment, Ohio Infantry
The 4th Regiment, Ohio Infantry was mustered in June 4, 1861 at Camp Dennison, Ohio. They were mustered out July 12, 1865 at Washington, District of Columbia. 
For more information on the history of this unit, see:
- Larry Stevens' Ohio in the Civil War, 4th Ohio Infantry
- The Civil War Archive section, 4th Regiment Infantry (3 years), (accessed 24 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.
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 Infantry.
- 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.
- Darby, Henrietta Jones. Descendants and known ancestors of William Jerry and Henrietta Harmon (Lybarger) Grimwood : maternal grandparents of Henrietta Jones Darby. (Manhattan, Kansas : Darby, 1962-1963) FHL Book 929.273 A1 no. 614 Vol.221 available digitally
- Keifer, Joseph Warren.Slavery and four years of war : a political history of slavery in the United States, together with a narrative of the campaigns and battles of the Civil War in which the author took part, 1861-1865. (Bethesda, Maryland : University Publications of America, c1993) FHL Fiche 6118138; Fiche 6118139
- Kepler, William. History of the three months' and three years' service, from April 16th, 1861 to June 22d 1864, of the Fourth Regiment Ohio Volunteer Infantry in the war for the Union. (Washington [District of Columbia] : Filmed by the Library of Congress Photoduplication Service, 1975) FHL Film 1550205
- National Park Service, The Civil War Soldiers and Sailors System, (accessed 6 December 2010).