
El Dorado
- County:
- Union County
- County Seat:
- Yes
- Area (mi²):
- 16.201
- State:
- Arkansas
El Dorado is a city located in Union County, Arkansas. El Dorado has a 2025 population of 16,319. It is also the county seat of Union County. El Dorado is currently declining at a rate of -1.66% annually and its population has decreased by -7.77% since the most recent census, which recorded a population of 17,694 in 2020.
The average household income in El Dorado is $61,450 with a poverty rate of 23.87%. The median age in El Dorado is 36 years: 32.8 years for males, and 37.9 years for females.