57th Regiment, Ohio Infantry
The 57th Regiment, Ohio Infantry mustered in September 16, 1861 at Camp Vance, Findlay, Ohio. They were mustered out August 14, 1865 at Rock, Arkansas. 
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.
National Park Service, The Civil War Soldiers and Sailors System, (accessed 6 December 2010).
- National Park Service, The Civil War Soldiers and Sailors System, (accessed 6 December 2010).