Most of Twin Oaks was built recently: 0.0% of its homes predate 1940 and the median home dates from 2012. Below: maps from 1940 on and the census since 1940.
Lost two-thirds of its people between 1960 and 1970, then grew more than tenfold.
9 censuses, 1940–2020.
U.S. Census Bureau decennial counts, from the census table on Twin Oaks’ Wikipedia page.
The story so far
Twin Oaks, in brief
Wikipedia doesn’t have a history of Twin Oaks yet. The photos, dates and memories neighbors add here are how it gets written.
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. The population was 392 at the 2010 census.
Twin Oaks was established in 1938. Between the 2010 and 2020 censuses its population grew from 392 to 605 (+54%).
Intro from Wikipedia. Population: U.S. Census Bureau.
Timeline
Twin Oaks, 1938 to 2020
Woven from the archive, old maps, post office records, the National Register and the people born here.
Founding dates: Wikidata, Wikipedia, the U.S. post office records of Blevins & Helbock (CC0) and the Census. Homes by year built: Census ACS 2020–24. National Register of Historic Places: National Park Service (list of May 22, 2026). Old photos, postcards and papers: Wikimedia Commons, the Library of Congress and other public archives, credited on each item’s page. Maps: U.S. Geological Survey historical topographic maps (via Esri) and Sanborn fire-insurance maps (Library of Congress). History text and census tables: Wikipedia (CC BY-SA 4.0). Places that used to be: USGS Geographic Names Information System (2021). How TownRatings grades history →
From U.S. Geological Survey historical maps, U.S. Census counts (via Wikipedia) and the USGS Geographic Names Information System. Archive images are copied here with their credits and licenses, shown on each photo’s page. Refreshed monthly.