John Calvin Pollock

John Calvin Pollock (October 5, 1857 – January 24, 1937) was a United States federal judge.

Born in Belmont County, Ohio, Pollock received an A.B. from Franklin College in 1882 and read law to enter the bar in 1884. He was in private practice in Newton, Iowa from 1884 to 1885, then in Hartville, Missouri until 1886, and then in Winfield, Kansas until 1901. He was a Justice of the Supreme Court of Kansas from 1901 to 1903.

On November 25, 1903, Pollock was nominated by President Theodore Roosevelt to a seat on the United States District Court for the District of Kansas vacated by William C. Hook. Pollock was confirmed by the United States Senate on December 1, 1903, and received his commission the same day. He served in that capacity until his death, in 1937.