Dover is an unincorporated community on the banks of Mission Creek in western Shawnee County, Kansas, United States. Founded in 1860, it was once a larger community, but it declined for most of the 20th century. Today a few commercial buildings remain at the intersection of K-4 Highway and 57th Street, but it is mainly a residential area. A newly founded Dover Community Foundation has been created to support the growth of the community and retention of its history.