Rapidan may refer to:
Minnesota Rapidan Township, Blue Earth County, Minnesota Rapidan, Minnesota Rapidan Dam, a concrete gravity dam on the Blue Earth River
Virginia Rapidan, Virginia Rapidan Camp, President Hoover's retreat Rapidan River Rapidan Wildlife Management Area
Other uses USS Rapidan (1919–1946), a Patoka-class replenishment oiler
See also Rapydan, a local anesthetic combination