The Lamar post office opened in 1887, the earliest record of the town by name. Another post office, Lenox (1886), opened inside today’s town and later closed.
First census: 122 in 19302020 census: 28139 years
How did Lamar get its name?
Lamar was named for Lucius Quintus Cincinnatus Lamar II, a former Confederate soldier and diplomat who wrote the Mississippi Ordinance of Secession and who served as United States Secretary of the Interior in the Grover Cleveland administration.
Lamar was laid out at its current site in 1887 when the Chicago, Burlington and Quincy Railroad was extended to that point. It was named for Lucius Quintus Cincinnatus Lamar II, a former Confederate soldier and diplomat who wrote the Mississippi Ordinance of Secession and who served as United States Secretary of the Interior in the Grover Cleveland administration.
A post office was established at Lamar in 1887, and remained in operation until it was discontinued in 1995.
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 (6), 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.