Frederick Lincoln Siddons (November 21, 1864 – June 19, 1931) was an Associate Justice of the Supreme Court of the District of Columbia.

He was a member of the Commission on Uniform State Laws for the District of Columbia.

[1] Siddons was a United States Commissioner for the Supreme Court of the District of Columbia from 1913 to 1915.

He was confirmed by the United States Senate on January 15, 1915, and received his commission the same day.

His service terminated on June 19, 1931, due to his death in Washington, D.C.[1] In 1927, Justice Siddons was involved in declaring a mistrial at one stage of the Teapot Dome affair, “the largest scandal in the U.S. government since the administration of President Ulysses S. Grant.”[2]