Smith Hickenlooper (February 13, 1880 – December 22, 1933) was an American attorney and jurist who served as a United States circuit judge of the United States Court of Appeals for the Sixth Circuit.

Hickenlooper returned to Ohio before the end of 1918 and served as a judge on the Superior Court of Cincinnati from 1918 to 1923.

[3] Hickenlooper was nominated by President Warren G. Harding on March 3, 1923, to a seat on the United States District Court for the Southern District of Ohio vacated by Judge John Weld Peck.

He was confirmed by the United States Senate on March 3, 1923, and received his commission the same day.

[5] Hickenlooper was nominated by President Calvin Coolidge on December 6, 1928, to a seat on the United States Court of Appeals for the Sixth Circuit vacated by Judge Maurice H. Donahue.