Gilroy’s post office opened in 1851, and 9 of its places are on the National Register
More historic than 46% of U.S. towns · #176 of 847 in California. What drives it
Most of Gilroy was built recently: 4% of its homes predate 1940 and the median home dates from 1989. Below: 6 old photos and papers, maps from 1886 on, and the census since 1870.
Founding year: the first Gilroy post office (Blevins & Helbock, CC0). Wikidata: 1870.The full story ↓
History grade
What drives Gilroy’s History grade
On its age, its old homes and the National Register, Gilroy is more historic than 46% of U.S. towns, #176 of 847 in California. Its National Register listings hold the grade up; its share of homes from before 1940 pulls it down.
B−
HistoryA character grade: shown, never part of Gilroy’s overall grade.
Few California towns list much on the Register (a typical California town has 0.0 per 10,000 residents, the U.S. 2.4), so Gilroy’s 1.5 sits above most of its state (79% of California towns have fewer) while its 9 listings outnumber those of 75% of U.S. towns.
How sure. Graded on any two of the three inputs instead, the letter would range from C− to B. The pre-1940 share (±1.0 points) is firm at this size. The founding year is the first post office, not a stated founding date; Wikidata’s 1870 falls in the same era, so the grade doesn’t depend on which one is used.
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 Gilroy’s past
Read from the archive, the National Register and the record. The page puts what stands out first.
National Park Service, National Register of Historic Places. Photos from Wikimedia Commons, credited on each place’s page.
Every building
Gilroy, building by building, 1886–1906
Fire insurance maps drew every building, what it was made of and what it was used for, so insurers could price the risk of fire. Pick a year, then a sheet.
Spanish explorers led by Juan Bautista de Anza first passed through the Santa Clara Valley area in 1776. More than 20 years later, Spanish missionaries established Mission San Juan Bautista in 1797 near the Pajaro River. In 1809, Ygnacio Ortega was granted the 13,066-acre (5,288 ha) Spanish land concession Rancho San Ysidro.
Passages that mention Gilroy, cut from the printed page as they were published.
History of Santa Clara County, California, with biographical sketches of the leading men and women of the county who have been identified with its growth and development from the early days to the present1922 · page 604Read the page →
Read the text
He opened the new station at Naples, and then for two years served as assistant agent at Gilroy. In 1902 he was given the agency at Morgan Hill, and he has discharged the duties there all these intervening years wdth exceptional satisfaction to the public.
Text read by machine from the scan; it may contain errors.
History of Santa Clara County, California1881 · page 017Read the page →
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the present town of Visalia. Thence, by every point of the compass, hunting for game, and at length reached Sobrianos, on the Salinas, near the Mission of Soledad. In the month of December, 1843, Mr. Martin and his party arrived safely at San Ysidro (Old Gilroy). Here he remained until 1850, when he moved to his present residence, about a mile from the new town of Gilroy, wdiere he has since resided. Some twenty years ago he was deprived of his sight. Here let us lepeat the picture of this worthy man, which, though drawn seventeen years ago, is still a faithful portrait: "Never
Text read by machine from the scan; it may contain errors.
History of Santa Clara County, California1881 · page 271Read the page →
Read the text
fogs drop their refreshing moisture pleasantly, having lost their rawness in their mountain climbing. The swelterinij heat often encountered at the depot by railroad travelers, who halt for their midday meal, has unjustly given the City of Gilroy a torrid name, but such is only the dictum, of the bird of passage, observation, both barometrical and thermometrical, proving the undoubted salubrity of the township.
Text read by machine from the scan; it may contain errors.
Scans and text from the Internet Archive. Books published in 1930 or earlier, which are in the public domain.
Timeline
Gilroy, 1851 to 1983
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 Gilroy post office opened in 1851, the earliest record of the town by name (U.S. post office records). Wikidata gives 1870.
How does Gilroy rank for history?
Gilroy is more historic than 46% of U.S. towns, #176 of 847 in California. 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 Gilroy?
9 listings: 8 buildings, among them the Old City Hall (listed 1975, the first), and 1 site.
How old are the homes in Gilroy?
4% of Gilroy’s homes were built before 1940 (Census estimate, ±1.0 points), against a typical 3.4% for a California 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 (4), the Library of Congress (7), Wikidata (7), the National Register of Historic Places (9), 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), the USGS Geographic Names Information System, Sanborn fire insurance maps (Library of Congress) and old county and town histories (Internet Archive). Archive images are copied here with their credits and licenses, shown on each photo’s page. Refreshed monthly.