San Diego is a city in Duval and Jim Wells counties, Texas, United States. The population was 4,488 at the 2010 census. It is located primarily in Duval County, of which it is the county seat. San Diego is located at 27°45′45″N 98°14′20″W (27.762559, -98.238771). It is 10 miles (16 km) west of Alice, 56 miles (90 km) west of Corpus Christi, and 84 miles (135 km) east of Laredo.
At the 2000 census there were 4,753 people, 1,548 households, and 1,187 families living in the city. The population density was 2,917.1 people per square mile (1,125.9/km2). There were 1,793 housing units at an average density of 1,100.4 per square mile (424.7/km2). The racial makeup of the city was 78.06% White, 0.27% African American, 0.78% Native American, 0.02% Asian, 0.04% Pacific Islander, 17.72% from other races, and 3.11% from two or more races. Hispanic or Latino of any race were 96.87%.
Of the 1,548 households 40.5% had children under the age of 18 living with them, 47.3% were married couples living together, 24.4% had a female householder with no husband present, and 23.3% were non-families. 21.3% of households were one person and 11.0% were one person aged 65 or older. The average household size was 3.03 and the average family size was 3.52.
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