Latham Castle (February 27, 1900 – March 10, 1986) was a United States circuit judge of the United States Court of Appeals for the Seventh Circuit.

Born in Sandwich, Illinois, Castle was in the United States Army towards the end of World War I, in 1918, and then received a Bachelor of Laws from Northwestern University Pritzker School of Law in 1924.

He was then a state's attorney of DeKalb County, Illinois from 1928 to 1940, becoming an assistant state attorney general of Illinois from 1940 to 1942.

He was succeeded as Attorney General by Grenville Beardsley.

[3] On February 26, 1959, Castle was nominated by President Dwight D. Eisenhower to a seat on the United States Court of Appeals for the Seventh Circuit vacated by Judge Philip J. Finnegan.