As of the census of 2000, there were 57,247 people, 23,842 households, and 13,732 families residing in the city of Galveston. The population density was 478.9/km² (1,240.4/mi²). There were 30,017 housing units at an average density of 251.1/km² (650.4/mi²). The racial makeup of the city was 58.66% White, 25.49% Black or African American, 0.42% Native American, 3.21% Asian, 0.07% Pacific Islander, 9.73% from other races, and 2.41% from two or more races. 25.77% of the population were Hispanic or Latino of any race.

There were 23,842 households out of which 26.3% had children under the age of 18 living with them, 36.6% were married couples living together, 16.9% had a female householder with no husband present, and 42.4% were non-families. 35.6% of all households were made up of individuals and 11.2% had someone living alone who was 65 years of age or older. The average household size was 2.30 and the average family size was 3.03.

In the city the population was spread out with 23.4% under the age of 18, 11.3% from 18 to 24, 29.8% from 25 to 44, 21.8% from 45 to 64, and 13.7% who were 65 years of age or older. The median age was 36 years. For every 100 females there were 93.4 males. For every 100 females age 18 and over, there were 90.4 males.

The median income for a household in the city was $28,895, and the median income for a family was $35,049. Males had a median income of $30,150 versus $26,030 for females. The per capita income for the city was $18,275. About 17.8% of families and 22.3% of the population were below the poverty line, including 32.1% of those under age 18 and 14.2% of those age 65 or over.

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