Green Park is a city in St. Louis County, Missouri, United States.

[5] GAccording to the United States Census Bureau, the city has a total area of 1.35 square miles (3.50 km2), all land.

There were 1,034 housing units at an average density of 765.9 per square mile (295.7/km2).

23.8% of all households were made up of individuals, and 10.9% had someone living alone who was 65 years of age or older.

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.

Out of the total population, none under the age of 18 and 10.3% of those 65 and older were living below the poverty line.