Most of Lamar was built recently: 8% of its homes predate 1940 and the median home dates from 1980. Below: maps from 1900 on and the census since 1930.
After the Missouri, Oklahoma and Gulf Railway (later the Kansas, Oklahoma and Gulf Railway (KO&G) constructed a line in 1907 connecting Dustin and Calvin, the Lamar community developed midway between the two towns. A post office was established on July 23, 1907. On September 14, 1907, J. R. Luttrell published the first issue of the weekly Lamar News. Two years later Lamar had a bank, a livery, a cotton gin, a lumberyard, a tin shop, a hardware store, and five general stores. Lamar incorporated on January 2, 1908. In 1909 R. L. Polk's Oklahoma State Gazetteer and Business Directory estimated that Lamar had a population of five hundred. Citizens passed a ten-thousand-dollar bond issue in May 1909 for the construction of a two-story, brick school building, completed in May 1910.
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 Wikipedia, 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.