1st Michigan Cavalry

1st Regiment Michigan Volunteer Cavalry
Michigan state flag
Active	August 21, 1861, to March 10, 1866
Country	United States
Allegiance	Union
Branch	Cavalry
Engagements	Battle of Winchester Battle of Cedar Mountain Battle of Second Bull Run Battle of Gettysburg Kilpatrick's Raid on Richmond Battle of the Wilderness Battle of Yellow Tavern Battle of Cedar Creek Battle of Five Forks Battle of Sailor's Creek

The 1st Regiment Michigan Volunteer Cavalry was a cavalry regiment that served in the Union Army during the American Civil War. It was a part of the famed Michigan Brigade, commanded for a time by Brigadier General George Armstrong Custer.

The 1st Michigan Cavalry was organized at Detroit, Michigan, between August 21 and September 6, 1861. Among the initial officers was William d'Alton Mann, a future prominent Michigan newspaper and magazine publisher.

The regiment was mustered out of service on September 12, 1865.

Over the span of its existence, the regiment carried a total of 2705 men on its muster rolls.

The regiment suffered 14 officers and 150 enlisted men killed in action or mortally wounded and 6 officers and 244 enlisted men who died of disease, for a total of 414 fatalities.