Stephen Moylan (1737 – April 11, 1811) was an Irish-American patriot leader during the American Revolutionary War.

In January 1776, he wrote a letter using the term "United States of America", the earliest known use of that phrase.

[5] Moylan joined the American Continental Army in 1775 and upon the recommendation of John Dickinson, was appointed Muster-Master General on August 11, 1775.

He was appointed Quartermaster General in the American Continental Army on June 5, 1776, succeeding Thomas Mifflin.

In the campaign of 1779, Moylan and the 4th Dragoons were stationed at Pound Ridge, New York, and saw military action when the British raided Norwalk, Connecticut, on July 11, 1779.

Col. Moylan commanded his Dragoons at the Siege of Yorktown in October 1781, after which he was to take the cavalry to the Southern Campaign.

[6] Moylan married Mary Ricketts Van Horne on September 12, 1778, and they had two daughters, Elizabeth Catherine and Maria.