Castroville dates to 1844, and 5 of its places are on the National Register
More historic than 82% of U.S. towns · #24 of 642 in Texas. What drives it
Most of Castroville was built recently: 10% of its homes predate 1940 and the median home dates from 1984. 5 places in town are on the National Register, among them a historic district with 12 buildings. Below: maps from 1982 on and the census since 1850.
Founding year: Wikidata; Wikipedia’s history section gives the same year. First post office: 1847.The full story ↓
History grade
What drives Castroville’s History grade
On its age, its old homes and the National Register, Castroville is more historic than 82% of U.S. towns, #24 of 642 in Texas. Its National Register listings hold the grade up; its share of homes from before 1940 pulls it down.
A−
HistoryA character grade: shown, never part of Castroville’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 Castroville’s 67.9 sits above most of its state (95% of Texas towns have fewer) while its 21 historic buildings outnumber those of 80% of U.S. towns.
How sure. Graded on any two of the three inputs instead, the letter would range from B to A. The pre-1940 share is a Census survey estimate (±4.2 points). Two sources give 1844.
Founding year: Wikidata (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 Castroville’s past
Read from the archive, the National Register and the record. The page puts what stands out first.
Castroville was established in 1844 by Henri Castro, an empresario of the Republic of Texas, who brought several dozen German, and French families such as the Boheme, Haby, Burges, Hoog, and Mcmullen Families, to the area from Alsace, Switzerland, and adjoining Baden to populate his land grant along the Medina River 20 miles (32 km) west of San Antonio. The first colonists disembarked at Galveston on January 9, 1843. They were taken by ship to Lavaca Bay and traveled overland to San Antonio, where they took shelter in abandoned buildings until the Texas Rangers were prepared to escort them to their land and protect them from hostile Indians. On September 2, 1844, the first colonists arrived at Castro's land grant on the Medina River.
U.S. Geological Survey historical topographic maps (public domain), via Esri’s collection of the scans. The red ring marks the center of Castroville.
People over time
Castroville, census by census
Grew from 366 people in 1850 to 2,954 in 2020, 8 times over.
13 censuses, 1850–2020.
U.S. Census Bureau decennial counts, from the census table on Castroville’s Wikipedia page.
Places that used to be
Old burying grounds
Castroville’s post office has been open since 1847.
3cemeteries and burying grounds inside Castroville
Castroville CommunitySaint LouisZion
US Post Offices dataset (Blevins & Helbock, CC0). Places and cemeteries from the USGS Geographic Names Information System (2021).
Questions about Castroville’s history
What year was Castroville founded?
In 1844, according to Wikidata and Wikipedia’s history of the town. Castroville’s post office opened in 1847, and the census of 1850 counted 366 people here.
How does Castroville rank for history?
Castroville is more historic than 82% of U.S. towns, #24 of 642 in Texas. 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.
What is on the National Register in Castroville?
5 listings: 4 buildings and 1 historic district, the Castroville Historic District, with 12 contributing buildings. 21 historic buildings in all.
How old are the homes in Castroville?
10% of Castroville’s homes were built before 1940 (Census estimate, ±4.2 points), against a typical 1.6% for a Texas town; the median home was built in 1984.
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 (11), Wikidata (1), the National Register of Historic Places (5), 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.