Daniel Ilsley (May 30, 1740 – May 10, 1813) was a U.S. Representative from Massachusetts.
Born in Falmouth, Maine (Portland) (then a part of Massachusetts), Ilsley received a liberal schooling. He became a distiller and was also interested in shipping. He served as a member of the committee of correspondence and safety. Major and mustering officer at Falmouth, Maine, during the Revolutionary War. He served as a delegate to the Massachusetts State convention in 1788 that adopted the Federal Constitution. He served as a member of the Massachusetts House of Representatives in 1793 and 1794.
Ilsley was elected as a Democratic-Republican to the Tenth Congress (March 4, 1807 – March 3, 1809). He was an unsuccessful candidate for reelection in 1808 to the Eleventh Congress. He died in Portland, Maine, May 10, 1813. He was interred in the Eastern Cemetery in Portland.