John Henry McCooey (June 18, 1864 – January 21, 1934) also referred to as Uncle John was an American politician, civic leader and political boss in the Democratic Party political machine of Brooklyn, New York.

[3] At an early age, McCooey became friends with John Francis Hylan, a future Mayor of New York City.

McCooey served as secretary and president of the New York City Civil Service Commission from 1899 through 1903.

[5] In 1932, McCooey was chosen by the New York delegation to succeed Norman E. Mack as a member of the Democratic National Committee.

[9] McCooey was brother-in-law of James J. Byrne, a member of the New York State Assembly and Brooklyn Borough President.