USS Challenger (ID-3630)
 USS Challenger was a U.S. freighter. It was commissioned by the U.S. Navy between 1918 and 1919 for service during World War I.She was built in 1918 by Union Iron Works San Francisco Calif. under a United States Shipping Board contract. The US Navy accepted delivery on 4 October 1918 and she was commissioned the same day with Lieutenant Commander G. T. January USNRF in command.