Cuba High School Annex, also known as the Crawford County Historical Society Museum, is a historic school building located at Cuba, Crawford County, Missouri. It was built in 1934 with funds provided by either the Civil Works Administration or the Works Progress Administration. It is a two-story, rectangular building built on a raised basement. It measures 60 feet by 30 feet and has a hipped roof. It is finished with random ashlar native stone laid in a “giraffe” pattern with grapevine joints.