Rucker is an unincorporated community in the northwest corner of Boone County, Missouri, United States. The community is located at the intersection of Missouri routes T and F about 6.5 miles north of Harrisburg. The site lies between Perche Creek and Sugar Creek.
A post office called Rucker was established in 1889, and remained in operation until 1908. The community was named for Maj. John F. Rucker.