109th Field Artillery Regiment (United States)

The 109th Field Artillery Regiment was an artillery regiment of the United States Army and the Pennsylvania Army National Guard.

The unit was organized on 17 October 1775 and was one of several National Guard units with colonial roots. The first unit commander was Colonel Zebulon Butler. The unit traces its origins to the 24th Regiment of the Connecticut Militia, as the Wyoming Valley was part of Connecticut at the time. After alternating between an infantry and artillery unit throughout the early years and campaigns, the battalion was designated as the 109th Field Artillery Regiment on 11 October 1917. The regiment served in combat during World War I and was commanded by Colonel Asher Miner and later by Colonel Charles M. Bundel.

During the 1950s and 1960s, under the Pentomic army structure, the 2nd Battalion, 109th Artillery, served with the 28th Division.