John Findlay (March 31, 1766 – November 5, 1838) was a member of the U.S. House of Representatives from Pennsylvania.
John Findlay (brother of James Findlay and William Findlay) was born in Mercersburg, Pennsylvania. He served as a prothonotary from 1809 to 1821. He served as captain in the War of 1812. He moved to Chambersburg, Pennsylvania, and served as a register and recorder of deeds, clerk of the orphans’ court and clerk of the court of quarter sessions from 1809 to 1818.
Findlay was elected as a Republican to the Seventeenth Congress to fill the vacancy caused by the resignation of James Duncan. He was reelected as a Jackson Republican to the Eighteenth Congress and elected as a Jacksonian to the Nineteenth Congress. He was not a candidate for renomination in 1826. He was appointed postmaster of Chambersburg on March 20, 1829, and held the office until his death there in 1838. Interment in Falling Spring Presbyterian Church Cemetery at Chambersburg.
| Preceded by James Duncan |
Member of the U.S. House of Representatives from Pennsylvania's 5th congressional district 1821 - 1823 alongside: James McSherry |
Succeeded by Philip Swenk Markley |
| Preceded by George Plumer |
Member of the U.S. House of Representatives from Pennsylvania's 11th congressional district 1823 - 1827 alongside: James Wilson |
Succeeded by James Wilson William Ramsey |