Founding year: Wikidata. First post office: 1900.The full story ↓
History grade
What drives Shamrock’s History grade
On its age, its old homes and the National Register, Shamrock is more historic than 66% of U.S. towns. Its share of homes from before 1940 holds the grade up; its age pulls it down.
B+
HistoryA character grade: shown, never part of Shamrock’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 Shamrock’s 5.8 sits above most of its state (83% of Texas towns have fewer) while its 1 listings outnumber those of 51% 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 (±6.9 points). Two sources give 1890.
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 Shamrock’s past
Read from the archive, the National Register and the record. The page puts what stands out first.
Located in south-central Wheeler County, Shamrock was the largest town in the county in the late 19th century. George and Dora Nickel consented to keep the first post office in their dugout in 1890. The mail was to be carried once a week from Mobeetie. The neighbors decided to let George name the office. His Irish-American mother had told him always to depend on a shamrock to bring him good luck, so holding true to his Irish descent, he suggested "Shamrock" for the name of the office. When a mysterious fire destroyed his dugout, however, George Nickel's post office never opened. Mary Ruth Jones became Shamrock's first postmistress, running the Shamrock post office out of the Jones family home.
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.
In 1890, according to Wikidata. Shamrock’s post office opened in 1900.
How does Shamrock rank for history?
Shamrock is more historic than 66% 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.
What is on the National Register in Shamrock?
One place: the Tower Station (listed 1997).
How old are the homes in Shamrock?
23% of Shamrock’s homes were built before 1940 (Census estimate, ±6.9 points), against a typical 1.6% for a Texas town; the median home was built in 1962.
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 (5), Wikidata (1), the National Register of Historic Places (1), Wikipedia, Wikidata and Wikipedia for famous people, 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.
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