Twin Oaks is a village in St. Louis County. The population was 362 at the 2000 census.
Twin Oaks is located at(38.566536, -90.500608).
According to the United States Census Bureau, the village has a total area of 0.3 mi², all land.
As of the census of 2000, there were 362 people, 166 households, and 111 families residing in the village. The population density was 1,403.8/mi². There were 167 housing units at an average density of 647.6/mi². The racial makeup of the village was 98.62% White, 0.28% African American and 1.10% Asian. Hispanic or Latino of any race were 0.55% of the population.
There were 166 households out of which 21.1% had children under the age of 18 living with them, 57.8% were married couples living together, 8.4% had a female householder with no husband present, and 33.1% were non-families. 28.9% of all households were made up of individuals and 10.2% had someone living alone who was 65 years of age or older. The average household size was 2.18 and the average family size was 2.69.
In the village the population was spread out with 14.6% under the age of 18, 6.6% from 18 to 24, 26.8% from 25 to 44, 32.6% from 45 to 64, and 19.3% who were 65 years of age or older. The median age was 46 years. For every 100 females there were 90.5 males. For every 100 females age 18 and over, there were 89.6 males.
The median income for a household in the village was $62,778, and the median income for a family was $68,125. Males had a median income of $53,750 versus $35,000 for females. The per capita income for the village was $33,316. 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.
<googlemap lat="38.567693" lon="-90.495819" zoom="11" width="700" controls="large">38.567693, -90.495819, Twin Oaks, MO, USA</googlemap>