|Elevation||367 ft (112 m)|
|Time zone||Central (CST) (UTC-6)|
|• Summer (DST)||CDT (UTC-5)|
|ZIP code||35077, 35033|
|GNIS feature ID||113207|
Arkadelphia was settled in the 19th century, with a post office opening in 1854. The town's etymology is disputed. Some believe Arkadelphia was the name of the wife of the first postmaster John A. Donaldson. Some believe it is a combination of "Ark-", the name of an early settlement in nearby Winston County, and "-adelphia", a pseudo-Greek combination meaning "brother-place," likely taken from Philadelphia. There is no known connection to Arkadelphia, Arkansas, an incorporated city founded in 1809 and renamed Arkadelphia in 1839.
Arkadelphia is located on Alabama Highway 91.
|U.S. Decennial Census|
1880 was the only year a population was officially reported for the unincorporated community: 195 persons. At the time, it was located in Blount County. It was the second largest community behind the then-county seat of Blountsville. Following a border adjustment between the two counties, it was shifted into Cullman County around 1900.
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