Green Park is a city in St. Louis County. The population was 2,666 at the 2000 census.
As of the census of 2000, there were 2,666 people, 961 households, and 720 families residing in the city. The population density was 1,909.0/mi². There were 985 housing units at an average density of 705.3/mi². The racial makeup of the city was 97.86% White, 0.04% Native American, 0.83% Asian, 0.08% Pacific Islander, 0.53% from other races, and 0.68% from two or more races. Hispanic or Latino of any race were 1.20% of the population.
There were 961 households out of which 31.3% had children under the age of 18 living with them, 61.8% were married couples living together, 9.6% had a female householder with no husband present, and 25.0% were non-families. 21.4% of all households were made up of individuals and 10.0% had someone living alone who was 65 years of age or older. The average household size was 2.54 and the average family size was 2.95.
In the city the population was spread out with 21.3% under the age of 18, 6.6% from 18 to 24, 26.3% from 25 to 44, 22.8% from 45 to 64, and 23.0% who were 65 years of age or older. The median age was 42 years. For every 100 females there were 84.6 males. For every 100 females age 18 and over, there were 79.2 males.
The median income for a household in the city was $49,069, and the median income for a family was $55,431. Males had a median income of $43,021 versus $29,934 for females. The per capita income for the city was $20,414. 3.1% of the population and 0.7% of families were below the poverty line. Out of the total population,None of those under the age of 18 and 10.3% of those 65 and older were living below the poverty line.
Green Park is located at(38.523603, -90.338144).
According to the United States Census Bureau, the city has a total area of 1.4 mi², all land. <googlemap lat="38.520235" lon="-90.336456" zoom="13" width="700" controls="large">38.51581, -90.33591, Green Park, MO</googlemap>