Ingleside is also home to Naval Station Ingleside. On August 24, 2005, the BRAC Committee voted to close the base.
As of the census of 2000, there were 9,388 people, 2,980 households, and 2,226 families residing in the city. The population density was 652.1 people per square mile (251.7/km²). There were 3,268 housing units at an average density of 227.0/sq mi (87.6/km²). The racial makeup of the city was 77.56% White, 5.60% African American, 0.88% Native American, 1.86% Asian, 0.27% Pacific Islander, 10.18% from other races, and 3.64% from two or more races. Hispanic or Latino of any race were 27.71% of the population.
There were 2,980 households out of which 45.4% had children under the age of 18 living with them, 60.7% were married couples living together, 9.5% had a female householder with no husband present, and 25.3% were non-families. 20.0% of all households were made up of individuals and 5.5% had someone living alone who was 65 years of age or older. The average household size was 2.87 and the average family size was 3.33.
In the city the population was spread out with 29.8% under the age of 18, 15.9% from 18 to 24, 33.3% from 25 to 44, 15.1% from 45 to 64, and 5.9% who were 65 years of age or older. The median age was 28 years. For every 100 females there were 119.7 males. For every 100 females age 18 and over, there were 126.6 males.
The median income for a household in the city was $37,789, and the median income for a family was $42,247. Males had a median income of $30,051 versus $20,847 for females. The per capita income for the city was $16,050. About 7.2% of families and 19.2% of the population were below the poverty line, including 12.9% of those under age 18 and 9.8% of those age 65 or over.