The Colony post office opened in 1896, the earliest record of the town by name.
First census: 201 in 19702020 census: 112130 years
How did Colony get its name?
Colony was named for the Seger Colony, founded in 1886, which taught modern agricultural techniques to the Arapaho and Cheyenne tribes that would be resettled in the vicinity.
John Seger, a native of Ohio and a Union veteran of the Civil War, was hired in 1872 to work as a mason/carpenter to build housing and other structures for a school for Native American children at the Darlington Agency. Later, he began a colony for Native Americans with Arapaho Indians, who were joined later by several Cheyennes. By the following year, Seger's colony had over 500 inhabitants. Seger began teaching modern agricultural methods as well as brick-making. By 1892, the colony had also built an industrial arts school, with the Native Americans providing the bricks and cutting stone for all the buildings.
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 Wikimedia Commons (1), Wikipedia, Wikidata and Wikipedia for famous people, U.S. Geological Survey historical maps, U.S. Census counts (via Wikipedia), the US Post Offices dataset (Blevins & Helbock) 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.