Bethany is a city in, and the county seat of, Harrison County, Missouri, United States, approximately midway between Kansas City and Des Moines on Interstate 35. The population was 2,915 at the 2020 census.
The settlement of Harrison County began circa 1838, although the land was not surveyed and opened for entry until 1842. The county is named after Albert C. Harrison, a 19th-century Missouri political figure. Many of the early settlers to the area homesteaded along Sugar Creek and in the Bethany area. Three commissioners deliberated for several days to determine a site for the county seat, and voted to site it in the southern part of the county. The original name of the community was Dallas.
In June 1845, John S. Allen was appointed to survey the town into lots and offer the same for sale. The plat, covering 19 acres (7.7 hectare), was completed on June 27, 1845.
The first home constructed in the community was built by John S. Allen. Although built as a residence,