Ohio Civil War Infantry Union Units

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Ohio Infantry Units

• Unassigned Ohio Colored Troops
  "Compendium of the War of the Rebellion" by Frederick H. Dyer contains no history for this unit.
  
  

• Unassigned Ohio Volunteers
  "Compendium of the War of the Rebellion" by Frederick H. Dyer contains no history for this unit.
  
  

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

• 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, District of Columbia.
  

• 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.
  

• 9th Regiment, Ohio Infantry
  Mustered in: May 27 to June 13, 1861 at Camp Dennison, Ohio.
  Mustered out: June 7, 1864 at Camp Dennison, Ohio.
  

• 9th Regiment, Ohio Infantry (3 months, 1861)
  Mustered in: April 22, 1861 at Camp Harrison near Cincinnati, Ohio.
  Mustered out: August 4, 1861 at Camp Dennison, Ohio.
  

• 10th Regiment, Ohio Infantry
  Mustered in: June 3, 1861 at Camp Dennison, Ohio.
  Mustered out: June 3, 1864.
  

• 10th Regiment, Ohio Infantry(3 months, 1861)
  Mustered in: May 7, 1861 at Camp Harrison near Cincinnati, Ohio.
  Mustered out: August 21, 1861.
  

• 11th Regiment, Ohio Infantry
  Mustered in: June 20, 1861 at Camp Dennison, Ohio.
  Mustered out: June 11, 1865 at Washington, District of Columbia.
  

• 11th Regiment, Ohio Infantry (3 months, 1861)
  Mustered in: April 18-26, 1861 at Camp Dennison, Ohio.
  Mustered out: July 20, 1861 at Camp Dennison, Ohio.
  

• 11th Regiment, Ohio Infantry Militia (1 month, 1862)
  "Compendium of the War of the Rebellion" by Frederick H. Dyer contains no history for this unit.
  

• 12th Regiment, Ohio Infantry
  Mustered in: June 28, 1861 at Camp Dennison, Ohio.
  Mustered out: July 11, 1864 at Columbus, Ohio.
  

• 12th Regiment, Ohio Infantry (3 months, 1861)
  Mustered in: April and May, 1861 at Camp Jackson, Columbus, Ohio.
  Mustered out: July 25, 1861 at Camp Dennison, Ohio.
  

• 13th Regiment, Ohio Infantry
  Mustered in: June 22, 1861 at Camp Dennison, Ohio
  Mustered out: December 5, 1865 at San Antonio, Texas.
  

• 13th Regiment, Ohio Infantry (3 months, 1861)
  Mustered in: April 20 to May 7, 1861 at Columbus, Ohio.
  Mustered out: August 14-25, 1861 at Camp Dennison, Ohio.
  

• 14th Regiment, Ohio Infantry
  Mustered in: August 14-September 5, 1861 at Toledo, Ohio.
  Mustered out: July 11, 1865 at Louisville, Kentucky.
  

• 14th Regiment, Ohio Infantry (3 months, 1861)
  Mustered in: April 25, 1861 at Toledo, Ohio.
  Mustered out: August 13, 1861 at Toledo, Ohio.
  

• 15th Regiment, Ohio Infantry
  Mustered in: September, 1861 at Mansfield, Ohio.
  Mustered out: December 27, 1865 at Columbus, Ohio.
  

• 15th Regiment, Ohio Infantry (3 months, 1861)
  Mustered in: April 27, 1861 at Columbus, Ohio.
  Mustered out: August 27-31, 1861 at Columbus, Ohio.
  

• 16th Regiment, Ohio Infantry
  Mustered in: September 23-December 2, 1861at Camp Tiffin, Wooster Camp Chase, and Zanesville.
  Mustered out: October 31, 1864 at Columbus, Ohio.
  

• 16th Regiment, Ohio Infantry (3 months, 1861)
  Mustered in: May 3, 1861at Columbus, Ohio.
  Mustered out: August 18, 1861 at Columbus, Ohio.
  

• 17th Regiment, Ohio Infantry
  Mustered in: August 30, 1861 at Camp Dennison, Ohio.
  Mustered out: July 16, 1865 at Louisville, Kentucky.
  

• 17th Regiment, Ohio Infantry (3 months, 1861)
  Mustered in: April 20, 1861 at Lancaster, Ohio.
  Mustered out: August 15, 1861 at Zanesville, Ohio.
  

• 18th Regiment, Ohio Infantry
  Mustered in: August 16 to September 28, 1861 at Athens, Ohio.
  Mustered out: November 9, 1864.
  

• 18th Regiment, Ohio Infantry (New)
  Mustered in: October 31, 1864 at Chattanooga, Tennessee.
  Mustered out: October 9, 1865 at Augusta, Georgia.
  

• 18th Regiment, Ohio Infantry (3 months, 1861)
  Mustered in: Companies "A," "C" and "E" enrolled at Ironton, Ohio, April 22, 1861; Company "B" at Marietta April 27; Company "D" at McArthur April 18; Company "F" at Gallipolis April 22; Company "I" at Jackson April 24; Company "K" at Beverly April 23, 1861. Regiment organized at Parkersburg and organization perfected May 29, 1861.
  Mustered out: August 28, 1861 at Columbus, Ohio.
  

• 19th Regiment, Ohio Infantry
  Mustered in: September 25, 1861 at Alliance, Ohio.
  Mustered out: October 24, 1865 at San Antonio, Texas.
  

• 19th Regiment, Ohio Infantry (3 months, 1861)
  Mustered in: April and May, 1861 at Cleveland, Ohio.
  Mustered out: Companies: "A" August 27, "B" and "C" August 29, "D" August 30, "E" August 28, "F" August 30, "G" August 31, "H" August 18, "I" August 30, "K" August 31, 1861 at Columbus, Ohio.
  

• 20th Regiment, Ohio Infantry
  Mustered in: August 19 to September 21, 1861 at Columbus, Ohio.
  Mustered out: July 18, 1865 at Louisville, Kentucky.
  

• 20th Regiment, Ohio Infantry (3 months, 1861)
  Mustered in: April and May, 1861 at Columbus, Ohio.
  Mustered out: August 23, 1861.
  

• 21st Regiment, Ohio Infantry
  Mustered in: September 19, 1861 at Findlay, Ohio.
  Mustered out: July 25, 1865 at Louisville, Kentucky.
  

• 21st Regiment, Ohio Infantry (3 months, 1861)
  Mustered in: April 27, 1861 at Camp Taylor, Cleveland, Tennessee.
  Mustered out: August 12, 1861.
  

22nd Regiment, Ohio Infantry
Mustered in: November 5, 1861 at Benton Barracks, Missouri.
Mustered out: November 18, 1864 at Camp Dennison, Ohio.

• 22nd Regiment, Ohio Infantry (3 months, 1861)
  Mustered in: April and May, 1861 at Camp Jackson, Columbus, Ohio.
  Mustered out: August 19, 1861.
  

• 23rd Regiment, Ohio Infantry
  Mustered in: June 11, 1861 at Camp Chase, Columbus, Ohio.
  Mustered out: July 26, 1865 at Cumberland, Maryland.
  

• 24th Regiment, Ohio Infantry
  Mustered in: May 29, to June 17, 1861 at Camps Chase and Jackson.
  Mustered out: June 17-24, 1864, at Chattanooga, Tennessee.
  

• 25th Regiment, Ohio Infantry
  Mustered in: June 28, 1861 at Camp Chase, Columbus, Ohio.
  Mustered out: June 18, 1866.
  

• 26th Regiment, Ohio Infantry
  Mustered in: June 8-July 24, 1861 at Camp Chase, Columbus, Ohio.
  Mustered out: October 21, 1865 at San Antonio and Victoria.
  

• From the 27th Regiment on,  all units were infantry.  See the units arranged by number for the rest of the infantry regiments..