The city of El Dorado encompasses the following counties: Union. El Dorado's government type is Mayor-council. It is comprised of the El Dorado City Council, Mayor, who is currently Frank Hash.
El Dorado encompasses land area: 16.3 sq mi (42.1 km2), water area: 0.1 sq mi (0.1 km2). According to the 2010 United States Census, the local population is 18,884. This equates to a population density of 1,312.8/sq mi (510.2/km2). Anyone living in the city is commonly known as a "El Doradoans". The local time zone is Central (CST) (UTC-6).
Zip codes in El Dorado include 71730, 71731, 71768. Local area codes are 870. The Federal Information Processing Standard (FIPS) code for the city is 05-21070, which is used in computer filings when non-government agencies and contractors fulfill government contracts. Additional information and the official website of the city is found at http://www.eldoradoar.org/.