Paul John McCormick (April 23, 1879 – December 2, 1960) was a United States federal judge.
Born in New York, New York, McCormick attended St. Ignatius College, and read law to enter the bar in 1900. He was in private practice in Los Angeles, California from 1900 to 1905. He was an Assistant district attorney of Los Angeles County, California from 1905 to 1910. He was a judge on the California Superior Court for Los Angeles County from 1910 to 1921. He was an Associate justice, District Court of Appeals of California from 1921 to 1924.
McCormick was a federal judge on the United States District Court for the Southern District of California. McCormick was nominated by President Calvin Coolidge on February 7, 1924, to a seat vacated by Oscar A. Trippet. He was confirmed by the United States Senate on February 11, 1924, and received his commission the same day. He served as chief judge from 1948-1951. He assumed senior status on September 1, 1951. McCormick served in that capacity until December 2, 1960, due to his death.