Peter Joseph O'Hara (21 August 1885 – 11 April 1977) was an Irish-American professional golfer who played in the early-to-mid 20th century.

Fellow Irish professional Pat Doyle was O'Hara's traveling companion aboard the Cymric which would find a watery grave just 13 months later on 8 May 1916 when it was sunk by a German U-boat during World War I.

The two brothers were a tough pair to beat in four-ball matches on their home course as evidenced by a surprising 6 and 5 victory they had in 1920 over the highly favored duo of Harry Vardon and Ted Ray.

[3] In the 1920 PGA Championship held at the Flossmore County Club, located south of Chicago, O'Hara got off to a good start with a 1 up victory over Pat Doyle in the first round.

His upset bid in the third round was spoiled when he lost to George McLean in a closely contested match that wasn't decided until the 38th hole.

[4] The 1924 U.S. Open was held 5–6 June at Oakland Hills Country Club in Birmingham, Michigan, a suburb northwest of Detroit.

NYF = tournament not yet founded NT = no tournament CUT = missed the half-way cut WD = withdrew R32, R16, QF, SF = round in which player lost in PGA Championship match play T = tied for a place Sources:[4] Peter O'Hara is sometimes also known as Peter O'Hare.