The 25th New Jersey Infantry Regiment was an American Civil War infantry regiment from New Jersey that served a nine-month enlistment in the Union Army.

The regiment trained at Camp in Beverly, before being sent out to Washington, DC.

There, it was attached to the 2nd brigade Casey's Division, Defenses of Washington, D. C until December, 1862.

Finally, it was attached to the 3rd Brigade, 2nd Division, 7th Army Corps to June, 1863.

[1] The regiment fought in two engagements–the December, 1862 Battle of Fredericksburg and the Siege of Suffolk, April 11 - May 4, 1863.