Arkadelphia
- County:
- Clark County
- County Seat:
- Yes
- Area (mi²):
- 7.73
- State:
- Arkansas
Arkadelphia is a city located in Clark County, Arkansas. Arkadelphia has a 2026 population of 9,894. It is also the county seat of Clark County. Arkadelphia is currently growing at a rate of 0.05% annually but its population has decreased by -4.49% since the most recent census, which recorded a population of 10,359 in 2020.