| Unit Name: | 31st New York Infantry Regiment |
| Dates: | May 14, 1861, to June 4, 1863 |
| Country: | United States |
| Allegiance: | Union |
| Branch: | Infantry |
| Battles: | American Civil War |
The 31st New York Infantry Regiment, "Baxter's Light Guard" or the "Montezuma Regiment", was an infantry regiment that served in the Union Army during the American Civil War.
The regiment was organized in New York City, New York, and was mustered in for a two-year enlistment on May 14, 1861.
The regiment was mustered out of service on June 4, 1863, and those men who had signed three year enlistments or who re-enlisted were transferred to the 121st New York on April 19, 1864.
The regiment suffered 6 officers and 62 enlisted men who were killed in action or mortally wounded and 3 officers and 1 officer and 29 enlisted men who died of disease, for a total of 98 fatalities.[1]