John Mason Parker (June 14, 1805 – December 16, 1873) was an American congressman from New York's 27th congressional district.

[1][5][6] On November 8, 1859, Parker was elected justice of the New York Supreme Court to an eight-year term.

On December 25, 1870, he was appointed to a general term by Governor John T. Hoffman and served as a justice with the third department of the court.

During his time on the bench, Parker was appointed as a sitting judge on the New York Court of Appeals in January 1867.

[1][5] Parker was awarded an honorary Doctor of Laws degree from Middlebury College in 1865.