The 4th Regiment, Vermont Volunteer Infantry (or 4th VVI) was a three year' infantry regiment in the Union Army during the American Civil War. It served in the Eastern Theater, predominantly in the VI Corps, Army of the Potomac, from September 1861 to July 1865. It was a member of the Vermont Brigade.
In July 1861, Congress authorized President Abraham Lincoln to call out 500,000 men, to serve for three years unless sooner discharged. The 4th Vermont Infantry was the third of the three years regiments from the state placed in the field as a result of this call, and organized simultaneously with the 5th Vermont Infantry. It was recruited from towns mostly in the southern part of the state. Nine of its ten companies were recruited from the east side of the state, an important cultural division at the time.
Governor Erastus Fairbanks' first choice to command the regiment was Lt. Col. Peter T. Washburn, late of the 1st Vermont Infantry, but he declined due to poor health. Fairbanks' second choice was 2nd Lt. Edwin H. Stoughton, U.S. Army, an 1859 graduate of the United States Military Academy in the 6th U.S. Infantry. He was a native of Bellows Falls. Maj. Harry W. Worthen, of Bedford, late of the 1st Vermont Infantry, was selected lieutenant colonel. John C. Tyler of Brattleboro became major, and Charles B. Stoughton, Edwin's younger brother, became adjutant.