John James "Jack" McGlynn (February 26, 1922 – August 20, 2016) was an American politician who served as mayor of Medford, Massachusetts, and as a member of the Massachusetts House of Representatives.

[2] During World War II, McGlynn was a member of the 23rd Headquarters Special Troops, a tactical deception unit known as the "Ghost Army" that worked to mislead the Germans about the size and location of American troops.

[2] McGlynn began his political career in 1954 as a candidate for city council in Medford.

From 1983 to 1997 he was the commissioner of the Massachusetts Public Employee Retirement Administration.

[2] Outside of politics, McGlynn worked as a realtor and owned a floral shop for several years after the war.