The 4th Iowa Cavalry Regiment was a cavalry regiment that served in the Union Army during the American Civil War.
Service
The 4th Iowa Cavalry was organized at Camp Harlan in Mount Pleasant, Iowa, beginning in September 1861, and mustered in for three years service under the command of Colonel Asbury B. Porter. Companies A, E, and F mustered November 23; Companies B, C, D, I, K, and M mustered November 25; Company G mustered November 27; Company L mustered December 24; and Company H mustered January 1, 1862.
The regiment was attached to 2nd Division, Army of Southwest Missouri, Department of Missouri, to July 1862. District of Eastern Arkansas, Department of Missouri, to December 1862. 2nd Brigade, 1st Cavalry Division, District of Eastern Arkansas, Department of the Tennessee, to January 1863. 2nd Brigade, 2nd Cavalry Division, XIII Corps, Department of the Tennessee, to May 1863. Unattached, XV Corps, Army of the Tennessee, to August 1863. Winslow's Cavalry Brigade, XVII Corps, to May 1864. 2nd Brigade, 1st Cavalry Division, XVI Corps, to July 1864. 2nd Brigade, 2nd Cavalry Division, District of West Tennessee, to November 1864. 1st Brigade, 4th Division, Wilson's Cavalry Corps, Military Division Mississippi, to December 1864. 2nd Brigade, Cavalry Division, District of West Tennessee, to February 1865. 1st Brigade, 4th Division, Cavalry Corps, Military Division Mississippi, to June 1865. Department of Georgia to August 1865.
The 4th Iowa Cavalry mustered out of service at Atlanta, Georgia, on August 10, 1865, and was discharged at Davenport, Iowa, on August 24, 1865.