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is a city in Shelby County, Alabama, United States. Chelsea was incorporated on March 1, 1996 with a population of 906. At the 2000 census the population was 2,949.
As of the census of 2000, there were 2,949 people, 1,022 households, and 849 families residing in the city. The population density was 293.6 people per square mile (113.4/km²). There were 1,091 housing units at an average density of 108.6/sq mi (42.0/km²). The racial makeup of the city was 96.78% White, 0.78% Black or African American, 0.88% Native American, 0.17% Asian, 0.03% Pacific Islander, 0.58% from other races, and 0.78% from two or more races. 0.81% of the population were Hispanic or Latino of any race.
There were 1,022 households out of which 44.2% had children under the age of 18 living with them, 74.2% were married couples living together, 6.6% had a female householder with no husband present, and 16.9% were non-families. 14.0% of all households were made up of individuals and 4.1% had someone living alone who was 65 years of age or older. The average household size was 2.86 and the average family size was 3.17.
In the city the population was spread out with 29.3% under the age of 18, 7.4% from 18 to 24, 34.0% from 25 to 44, 22.1% from 45 to 64, and 7.3% who were 65 years of age or older. The median age was 34 years. For every 100 females there were 98.9 males. For every 100 females age 18 and over, there were 98.0 males.
The median income for a household in the city was $67,083, and the median income for a family was $72,206. Males had a median income of $46,071 versus $28,403 for females. The per capita income for the city was $24,717. About 5.5% of families and 7.2% of the population were below the poverty line, including 8.4% of those under age 18 and 9.2% of those age 65 or over.
The population of Chelsea is rapidly increasing due to new home construction in the area. The largest of these neighborhoods is Chelsea Park , a joint venture between Eddleman Properties and Thornton Homes, which will feature about 3000 new homes when completed.