Richard Arnold (April 12, 1828 – November 8, 1882) was a career U.S. Army officer who served as a brigadier general in the Union forces during the American Civil War.

[1] His classmates included Eugene A. Carr and Cuvier Grover, who would serve alongside him in the Trans-Mississippi Theater during the Civil War.

In 1862, he served in various staff positions with the Army of the Potomac, including as a division artillery chief and Assistant Inspector General for the VI Corps.

After the Seven Days Battles, he received a commission as a brigadier general of the volunteers and was transferred to the Department of the Gulf, where he was assigned as Chief of Artillery.

[3] The World War II mine planter USS Dick Arnold was named in the general's honor.