More historic than 21% of U.S. towns · #325 of 642 in Texas. What drives it
Most of Caddo Mills was built recently: 3% of its homes predate 1940 and the median home dates from 1997. Below: maps from 1962 on and the census since 1940.
Founding year: the first Caddo Mills post office (Blevins & Helbock, CC0).The full story ↓
History grade
What drives Caddo Mills’ History grade
On its age, its old homes and the National Register, Caddo Mills is more historic than 21% of U.S. towns, #325 of 642 in Texas. Its age holds the grade up; its share of homes from before 1940 pulls it down.
C−
HistoryA character grade: shown, never part of Caddo Mills’ 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 Caddo Mills’ 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 C− to C. The pre-1940 share is a Census survey estimate (±3.2 points). 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 Caddo Mills’ past
Read from the archive, the National Register and the record. The page puts what stands out first.
Before settlers arrived, the area was the site of a Caddo campground. Pioneers arrived in the late 1850s. About 20 years later, I.T. Johnson and Henry King built a gristmill, and residents started referring to the community as Caddo Mills after the facility. On June 16, 1879, a post office opened. Around this time, the community had about 100 residents, three churches, and a school. In 1886, the Missouri, Kansas and Texas Railway built a line through the town, and the population increased to 500. In the 1890s and early 1900s, the town became home to a newspaper and a bank. The population swelled to 790, but began declining in the 1920s. Caddo Mills had 390 residents and 20 businesses when it was finally incorporated in the early 1940s.
Caddo Mills’s post office has been open since 1879.
Caddo Villa
1859–today
Caddo Mills
1879–today
18501940today
US Post Offices dataset (Blevins & Helbock, CC0). Places and cemeteries from the USGS Geographic Names Information System (2021).
Questions about Caddo Mills’ history
What year was Caddo Mills founded?
The Caddo Mills post office opened in 1879, the earliest record of the town by name (U.S. post office records).
How does Caddo Mills rank for history?
Caddo Mills is more historic than 21% of U.S. towns, #325 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.
How old are the homes in Caddo Mills?
3% of Caddo Mills’ homes were built before 1940 (Census estimate, ±3.2 points), against a typical 1.6% for a Texas town; the median home was built in 1997.
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 (6), 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.