The 120th New York Infantry Regiment was an infantry regiment in the Union Army during the American Civil War.

The 120th New York Infantry was organized at Kingston, New York,[3] and mustered in for three years service on August 22, 1862, under the command of Colonel George Henry Sharpe.

The 120th New York Infantry mustered out of service June 3, 1865.

Veterans and recruits whose enlistments had not expired were transferred to the 73rd New York Infantry.

[4] The regiment was attached to the following brigades:[1] The official list of battles in which the regiment bore a part:[1] The regiment lost a total of 384 men during service: 11 officers and 140 enlisted men killed or mortally wounded, 3 officers and 179 enlisted men died of disease, and 51 died in Confederate prisons.