William Maclay (March 22, 1765 – January 4, 1825) was an early-American lawyer who served two terms as a member of theUnited States House of Representatives fromPennsylvania from 1815 to 1819.
Maclay was born inLurgan Township, Pennsylvania. He attended the country schools, studied law, was admitted to the bar in 1800 and commenced the practice of his profession atChambersburg, Pennsylvania. He was county commissioner ofFranklin County, Pennsylvania, in 1805 and 1806.
He was a member of thePennsylvania House of Representatives in 1807 and 1808, and served as associate judge for the Cumberland district in 1809.
Maclay was elected as a Republican to theFourteenth andFifteenth Congresses, serving from 1815 to 1819.
He died in Lurgan in 1825 and was interred in Middle Springs Cemetery.
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| Preceded by | Member of the U.S. House of Representatives fromPennsylvania's 5th congressional district 1815–1819 1817–1819 alongside:Andrew Boden | Succeeded by |