"National Volunteers" and "Monitors") was an infantry regiment in the Union Army during the American Civil War.

The 127th New York Infantry was organized at Staten Island, New York beginning July 10, 1862, and mustered in for three-years service on September 8, 1862, under the command of Colonel William Gurney.

The regiment was attached to Abercrombie's Brigade, Defenses of Washington, D.C., to October 1862.

3rd Brigade, Abercrombie's Division, XXII Corps, Department of Washington, to April 1863.

2nd Brigade, 3rd Division, VII Corps, Department of Virginia, to July 1863.

1st Separate Brigade, Northern District, Department of the South, to March 1865.

Operations against Charleston and duty on Folly and Morris Islands, South Carolina, until October 1864.

Assault on Fort Johnson and Battery Simpkins, James Island, South Carolina, July 3, 1864.