John Stephen Monagan (December 23, 1911 – October 23, 2005) was a Connecticut politician, lawyer, and author. Monagan graduated from Dartmouth College in 1933, where he majored in French literature and was the editor of the Dartmouth Jack-O-Lantern. He was a Brother of the Dartmouth Chapter of the Alpha Delta Phi. After attending Harvard University law school, he served on the Board of Aldermen in Waterbury, Connecticut and became Mayor of Waterbury in 1943, serving until 1948. The Papers of John S. Monagan at Dartmouth College Library