Fort Osage Senior High School is a high school located at 2101 N. Twyman Rd. in unincorporated Jackson County, Missouri, in the Kansas City metropolitan area, adjacent to Independence. It belongs to the Fort Osage R-1 School District and serves a section of northern Independence.It currently serves approximately 1,500 students from grades 9-12. It is named after the Fort Osage National Historic Landmark along the Missouri River in nearby Sibley, Missouri.Fort Osage athleticsFall athletics Football Cross Country Golf (Girls) Soccer (Boys) Softball Tennis (Girls) VolleyballWinter athletics Basketball (Boys) Basketball (Girls) WrestlingSpring athletics Baseball Golf (Boys) Soccer (Girls) Tennis (Boys) Track & Field