There were 3,931 households out of which 37.3% had children under the age of 18 living with them, 53.1% were married couples living together, 13.5% had a female householder with no husband present, and 28.5% were non-families. 25.8% of all households were made up of individuals and 14.4% had someone living alone who was 65 years of age or older. The average household size was 2.74 and the average family size was 3.31. According to the United States Census Bureau, the city has a total area of 7.5square miles (19.3Square kilometers), all of it land. El Campo is a city in Wharton County, Texas, United States. The population was 10,945 at the 2000 census, making it the largest city in Wharton County.