Twin Oaks is a 4th class city in St. Louis County, Missouri, United States.

The former Village of Twin Oaks changed its status to that of a city by public election in November 2016.

[5] According to the United States Census Bureau, the village has a total area of 0.27 square miles (0.70 km2), all land.

33.3% of all households were made up of individuals, and 12.4% had someone living alone who was 65 years of age or older.

The racial makeup of the village was 98.62% White, 0.28% African American and, 1.10% Asian.

None of the families and 1.7% of the population were living below the poverty line, including no under eighteens and 2.9% of those over 64.

St. Louis County Library Grand Glaize Branch is in Manchester, adjacent to Twin Oaks.