William McCreery (17 May 1786-27 September 1841) was a member of the US House of Representatives (D-PA 15) from 4 March 1829 to 3 March 1831, succeeding Joseph Lawrence and preceding Thomas M.T. McKennan. Born in Omagh, County Tyrone, Ireland in 1786, he settled in Fairfield, Pennsylvania in 1791 and later in Paris in 1812. He served in the state house from 1824 to 1827, in Congress, as a collector of internal revenue at Pittsburgh from 1831 to 1833, in the state house from 1833 to 1836, and as supervisor of the Pennsylvania State Canal in Allegheny City.