Founding year: the first Idalou post office (Blevins & Helbock, CC0).The full story ↓
History grade
What drives Idalou’s History grade
On its age, its old homes and the National Register, Idalou is more historic than 8% of U.S. towns. Its National Register listings hold the grade up; its age pulls it down.
D
HistoryA character grade: shown, never part of Idalou’s overall grade.
Few Texas towns list much on the Register (a typical Texas town has 0.0 per 10,000 residents, the U.S. 2.4), so Idalou’s 0.0 sits below most of its state (34% of Texas towns have fewer) while its 0 listings outnumber those of 23% of U.S. towns.
How sure. Graded on any two of the three inputs instead, the letter would still be D. The pre-1940 share (±1.8 points) is firm at this size. The founding year is the first post office, not a stated founding date.
Founding year: the first post office (other dates in Quick answers). Homes: Census ACS 2020–24. National Register: National Park Service, May 2026 list; each listing counted once (boundary changes and added documentation belong to their listing), and a historic district counts its contributing buildings. How TownRatings grades history →
What stands out about Idalou’s past
Read from the archive, the National Register and the record. The page puts what stands out first.
Idalou began as a settlement around a depot on the South Plains and Santa Fe Railway in the early 1910s, and within a few years had a one-room schoolhouse and several businesses. The first post office was opened in 1917, and in 1919, a two-story brick school was built after the original school burned down. Incorporated in 1925 with 538 residents, the town grew to 2,348 residents by 1980 and has remained above 2,000 residents in the years since.
The Idalou post office opened in 1917, the earliest record of the town by name (U.S. post office records).
How does Idalou rank for history?
Idalou is more historic than 8% of U.S. towns. The History grade combines the town’s founding era, the share of homes built before 1940 and its National Register listings. It’s a character grade, so it isn’t part of the overall grade. How it works.
How old are the homes in Idalou?
1% of Idalou’s homes were built before 1940 (Census estimate, ±1.8 points), against a typical 1.6% for a Texas town; the median home was built in 1969.
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).
From 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.
