Hilary Baker (February 21, 1746 – September 25, 1798) was the mayor of Philadelphia, Pennsylvania, USA, from 1796 to 1797.
He began his career as a hardware merchant. In 1779, he was clerk of the Court of Quarter Sessions in Philadelphia, and a member of the Pennsylvania Constitutional Convention of 1787. Baker was elected alderman from 1789 to 1796, and elected mayor in 1796. He was re-elected in 1797, but died in the 1798 yellow fever outbreak in Philadelphia, where he was buried in Laurel Hill Cemetery.