Ohio Civil War Infantry Union Units

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Ohio Infantry Units

• 1st Regiment, Ohio Infantry (3 months, 1861)
  Organized at large: April 14 to April 29, 1861. Mustered in: April 17, 1861.
  Length of service: 3 months.
  Mustered out: August 2, 1861 in Ohio.
  

• 1st Regiment, Ohio Infantry
  Mustered in: August 5 to October 30, 1861 at Camp Corwin, Dayton, Ohio.
  Mustered out: September 24 to October 14, 1864. Recruits transferred to 18th Ohio Volunteers Infantry October 31, 1864. Ordered to the reach for muster out.
  

• 2nd Regiment, Ohio Infantry (3 months, 1861)
  Mustered in: April 18, 1861 at Columbus, Ohio.
  Mustered out: July 31, 1861 at Virginia.
  

• 2nd Regiment, Ohio Infantry
  Mustered in: July 17 to September 20, 1861 at Camp Dennison, Ohio.
  Mustered out: October 10, 1864 expiration of term. Recruits transferred to 18th Ohio Infantry and mustered out at Chattanooga, Tennessee.
  

• 2nd Regiment, Ohio Infantry (3 months, 1861)
  Mustered in: April 18, 1861 at Columbus, Ohio.
  Mustered out: July 31, 1861.
  

• 2nd Regiment, Ohio Infantry Militia (30 days, 1862)
  "Compendium of the War of the Rebellion" by Frederick H. Dyer contains no history for this unit.
  

• 2nd Regiment, Ohio Infantry Militia
  "Compendium of the War of the Rebellion" by Frederick H. Dyer contains no history for this unit.
  

• 3rd Regiment, Ohio Infantry
  Mustered in: June 4, 1861 at Camp Dennison, near Cincinnati, Ohio.
  Mustered out: June 23, 1864 at Camp Dennison, Ohio.
  

• 3rd Regiment, Ohio Infantry (3 months, 1861)
  Organized at Camp Jackson, Columbus, Ohio, April 25, 1861.
  Moved to Camp Dennison, Ohio, April 28, and duty there until June 12. Reorganized for three years' service June 12, 1861. Three-months men mustered out July 24, 1861.
  

• 4th Battalion, Ohio Infantry
  "Compendium of the War of the Rebellion" by Frederick H. Dyer contains no history for this unit.
  

• 4th Regiment, Ohio Infantry
  Mustered in: June 4, 1861 at Camp Dennison, Ohio.
  Mustered out: July 12, 1865 at Washington, D. C.
  

• 4th Regiment, Ohio Infantry (3 months, 1861)
  Mustered in: April 25, 1861 at Camp Jackson, Columbus, Ohio.
  Mustered out: July 24, 1861 at Camp Dennison, Ohio.
  

• 5th Regiment, Ohio Infantry
  Mustered in: June 20, 1861 at Camp Dennison, Ohio.
  Mustered out: July 26, 1865 at Louisville, Kentucky.
  

• 5th Regiment, Ohio Infantry (3 months, 1861)
  Mustered in: April 20, 1861 at Camp Harrison, near Cincinnati, Ohio.
  Mustered out: July 24, 1861 at Camp Dennison, Ohio.
  

• 6th Regiment, Ohio Infantry
  Mustered in: June 18, 1861 at Camp Dennison, Ohio.
  Mustered out: June 23, 1864 at Camp Dennison, Ohio.
  

• 6th Regiment, Ohio Infantry (3 months, 1861)
  Mustered in: April 27, 1861 at Camp Harrison, near Cincinnati, Ohio.
  Mustered out: July 24, 1861 at Camp Dennison, Ohio.
  

• 6th Regiment, Ohio Infantry Militia (1 month, 1862)
  "Compendium of the War of the Rebellion" by Frederick H. Dyer contains no history for this unit.
  

• 7th Regiment, Ohio Infantry
  Mustered in: June 16, 1861 at Camp Dennison, Ohio.
  Mustered out: July 6, 1864.
  

• 7th Regiment, Ohio Infantry (3 months, 1861)
  Mustered in: April 22-25, 1861 at Cleveland, Ohio.
  Mustered out: July 24, 1861 at Camp Dennison, Ohio.
  

• 8th Regiment, Ohio Infantry
  Mustered in: June 22, 1861 at Camp Dennison, Ohio.
  Mustered out: July 13, 1865 at Cleveland, Ohio.
  

• 8th Regiment, Ohio Infantry (3 months, 1861)
  Mustered in: April 18-May 4, 1861 at Cleveland, Ohio.
  Mustered out: July 24, 1861 at Camp Dennison, Ohio.
  

• 8th Regiment, Ohio Infantry Militia (1 month, 1862)
  "Compendium of the War of the Rebellion" by Frederick H. Dyer contains no history for this unit.