John McKinney (1829 – October 12, 1871) was a United States federal judge.
McKinney was born in Lycoming County, Pennsylvania. He graduated from Princeton University with a Bachelor of Arts degree in 1848. He read law in 1850.
He served as a clerk in the Solicitor's Office of the U.S. Department of Treasury in Washington, D.C., beginning in 1861.
President Ulysses S. Grant appointed McKinney (through a recess appointment) to the United States District Court for the Southern District of Florida on November 8, 1870, to the seat vacated by Thomas Jefferson Boynton. McKinney was nominated on December 7, 1870. Confirmed by the Senate on February 18, 1871. He received commission on February 18, 1871.
McKinney served on the court until his death in 1871.