Most of Llano Grande was built recently: 0.0% of its homes predate 1940 and the median home dates from 1989. Below: 1 old photo or paper, maps from 1956 on, and the census since 2000.
Founding year: the first Llano Grande post office (Blevins & Helbock, CC0).
History grade
What drives Llano Grande’s History grade
On its age, its old homes and the National Register, Llano Grande is more historic than 3% of U.S. towns. Its National Register listings hold the grade up; its share of homes from before 1940 pulls it down.
D−
HistoryA character grade: shown, never part of Llano Grande’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 Llano Grande’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 range from D− to D. The pre-1940 share (±1.1 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 Llano Grande’s past
Read from the archive, the National Register and the record. The page puts what stands out first.
Llano Grande had its own post office from 1906 to 1916.
Llano Grande
1906–1916
19001960today
Hamlets and corners on the map
Agua Dulce ColoniaCuellar Colonia Number 1Cuellar Colonia Number 2Llano Grande HomesitesLos Castillos Estates ColoniaR C Babb ColoniaR C Babb Colonia Number 2R C Babb Colonia Number 3 and 4Siesta Village Number 1 ColoniaSiesta Village Number 2 ColoniaSiesta Village Number 3 ColoniaSiesta Village Number 4 Colonia
US Post Offices dataset (Blevins & Helbock, CC0). Places and cemeteries from the USGS Geographic Names Information System (2021).
The story so far
Llano Grande, in brief
Wikipedia doesn’t have a history of Llano Grande yet. The photos, dates and memories neighbors add here are how it gets written.
Llano Grande (Spanish "Great Plain") is a census-designated place (CDP) in Hidalgo County, Texas, United States. The population was 2,952 at the 2020 United States Census. It is part of the McAllen–Edinburg–Mission Metropolitan Statistical Area. Llano Grande means "Big Plain" in Spanish. Nearby Llano Grande State Park is popular with bird watchers and the supposed site of many ghost appearances, including the ghosts of historic figures in Texas history.
Its first post office opened in 1906. Its population held steady between the last two censuses: 3,008 in 2010, 2,952 in 2020.
Intro from Wikipedia. Population: U.S. Census Bureau.
Timeline
Llano Grande, 1906 to 1956
Woven from the archive, old maps, post office records, the National Register and the people born here.
Nothing in the archives for these yearsWeddings on Main Street, storms, parades, school pictures, the old store. If it’s in your family album, it belongs here.
The Llano Grande post office opened in 1906, the earliest record of the town by name (U.S. post office records).
How does Llano Grande rank for history?
Llano Grande is more historic than 3% 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 Llano Grande?
0.0% of Llano Grande’s homes were built before 1940 (Census estimate, ±1.1 points), against a typical 1.6% for a Texas town; the median home was built in 1989.
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 Wikimedia Commons (2), 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.
2004
