Elbridge Leroy Sweetser (September 25, 1869 – January 26, 1951) was a Massachusetts attorney, politician, judge, and military officer.

A Republican, Sweetser served as judge of the district court in Everett and Commissioner of the Massachusetts Department of Labor and Industries.

A Republican, Sweetser served as an alderman and special justice of the Everett district court, and was the state's Commissioner of Labor and Industries from 1919 to 1931.

[8] In November 1919, he was appointed to a three-year term as Commissioner of the Massachusetts Department of Labor and Industries, and he served in this post until 1931.

[10] He was active in civic and fraternal organizations including the Woodlawn Cemetery Corporation, Masons, Order of the Eastern Star, Elks, General Society of Colonial Wars, and Sons of Union Veterans.

[19] When army leaders determined that the need for volunteers had ended, 5th Massachusetts soldiers began to receive discharges, and the regiment was officially mustered out in March 1899.

[15] In April 1908, he commanded National Guard forces that took part in the response to the Great Chelsea fire of 1908.

[15] In March 1913, Sweetser received promotion to brigadier general and assignment as commander of the Massachusetts National Guard's 2nd Brigade.

[15] In June 1916, he was activated for federal service as commander of his brigade when it performed duty on the Texas-Mexico border during the Pancho Villa Expedition.

[15] In August 1917, Sweetser was called to federal active duty for World War I as commander of the 51st Depot Brigade, a unit of the 26th Division, that was organized and trained at Camp Greene, North Carolina.

[15] In September 1918, Sweetser was assigned to Camp Sevier in Taylors, South Carolina as commander of the 20th Division's 39th Infantry Brigade.

[24][25] Among Sweetser's other post-First World War activities was a term as president of the Massachusetts National Guard Association.