Arkadelphia
Arkadelphia is a community in southern Cullman County, centered on the intersection of Alabama Highway 91 and Cullman County Road 35 about five miles southwest of Colony.
The community's post office was established in 1854. The origin of the name is unclear, with some saying it honored postmaster John Donaldson's wife. It may also be a combination of "Ark" (possibly for the Winston County community) and "-adelphia" from Philadelphia. Notable early residents of the community included the family of Charles Drennen.
Swan's Grocery and the Arkadelphia Cemetery are located in the community.
The section of U.S. Highway 78 called Arkadelphia Road in Birmingham is part of a now obscured road that once continued north to Arkadelphia. Cullman County Road 89 between Warrior-Jasper Road and Cullman County Road 5 is also named Arkadelphia Road.