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

[4] According to the United States Census Bureau, the city has a total area of 0.71 square miles (1.84 km2), all land.

There were 1,817 housing units at an average density of 2,559.2 per square mile (988.1/km2).

28.0% of all households were made up of individuals, and 12.3% had someone living alone who was 65 years of age or older.

There were 1,823 housing units at an average density of 2,570.0 per square mile (992.3/km2).

23.7% of all households were made up of individuals, and 8.3% had someone living alone who was 65 years of age or older.