New York provided 413,686 men to the Union Army during the Civil War. This was the largest number of any state, and almost a third more than the second largest contributor, Pennsylvania.

These men were organized into:

Infantry: 254 regiments and 1 battalion

Cavalry: 32 regiments, 1 battalion and 3 independent companies of cavalry

Heavy Artillery: 26 regiments and 5 battalions

Light Artilery: 6 battalions and 66 batteries of light artilery

Engineers: 4 regiments

Sharpshooters: 1 battalion and 4 independent companies

Due to the large numbers of organizations, New York units are indexed on three pages:

New York Infantry

New York Cavalry

New York Artillery and Engineers