Twin Oaks, Missouri Demographics & Population 2026

A note before these figures: with a population of 734, Twin Oaks's ACS estimates come from a small number of survey responses and carry wide margins of error. Individual percentages below — particularly rates that round to 0% or 100% — are approximations, not precise measurements. See data.census.gov for the published margins of error.

Population Overview

Twin Oaks is a small community located in Missouri, within St. Louis County. The total population is 734. It ranks as the 437th most populous out of 1,062 Census-designated places in Missouri.

Age Demographics

The median age in Twin Oaks is 42.4 years. This is 9% higher than the state median of 39.0 years. Only 9.7% of residents are under 18, indicating fewer families with children.

Economy, Income & Housing

The median household income in Twin Oaks is $120,151. This is 70% higher than the state median of $70,702. It is also 49% higher than the national median of $80,734. The poverty rate stands at 2.7%. This is 78% lower than the state poverty rate of 12.6%. This exceptionally low poverty rate indicates strong economic prosperity across the community. The unemployment rate is 1.7%. This is 58% lower than the state rate of 4.0%. The median home value is $298,800. Housing costs are 30% higher than the state median of $230,300. With a home-value-to-income ratio of just 2.5x, Twin Oaks is one of the most affordable housing markets in the area. 32.0% of occupied housing units are owner-occupied. This homeownership rate is 53% lower than the state average of 68.1%.

Race & Ethnicity

Twin Oaks has a predominantly White (non-Hispanic) population, comprising 89.1% of all residents. Asian residents account for 3.7%. The Black or African American population (3.0%) is well below the state average of 10.9%. The Hispanic or Latino population (1.5%) is well below the state average of 5.2%. The Asian population is significantly higher than the state average (3.7% vs 2.1%).

Education

76.5% of residents aged 25 and older hold a bachelor's degree or higher. This places Twin Oaks in the top 10% of all cities in the state for educational attainment. This is 136% higher than the state rate of 32.4%. Nationally, 35.7% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 97.1%. Notably, 29.0% of adults hold a graduate or professional degree, indicating a highly educated workforce.

Data Sources & Methodology

All demographic data for Twin Oaks, Missouri is sourced from the U.S. Census Bureau's American Community Survey (ACS) 2020–2024 5-Year Estimates. The ACS collects data from approximately 3.5 million households annually and pools five years of responses so that even small communities can be measured, though the margin of error widens as the population falls. Comparisons are made against Missouri state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 1,062 Census-designated places in Missouri. Read more about how these figures are produced on our methodology page, or visit data.census.gov for official data.