Each edition grades its towns against each other only.
Below: 2 old photos and papers, maps from 1914 on, and the census since 2000.
The San Geronimo post office opened in 1895, the earliest record of the town by name.
Read from the archive, the National Register and the record. The page puts what stands out first.
The first neighbors to add old photos shape how San Geronimo’s history is told.
Every edition of the U.S. Geological Survey’s map of San Geronimo. Tap a year, or press play to watch the town change.
U.S. Geological Survey historical topographic maps (public domain), via Esri’s collection of the scans. The red ring marks the center of San Geronimo.
From Wikipedia’s history of San Geronimo.
The first known map to depict the San Geronimo Valley was published in 1834. Prior to 1877, the place was called Nicasio. The San Geronimo post office opened in 1895, closed in 1910, and re-opened in 1911.
Text from Wikipedia, licensed CC BY-SA 4.0.
Passages that mention San Geronimo, cut from the printed page as they were published.
put into a planing mill. In 1874 Isaac Shaver located a portable saw-mill on the White ranch, about a mile south of San Geronimo Station. It was run six months. In 1875 Isaac Shaver and Edmund and Samuel Kiler built a mill on the road between White's Hill and San Geronimo. Its capacity was twelve thousand feet daily, and was run for six months. In 1876 the same company built a mill about two miles west of San Geronimo, with a capacity of twenty thousand feet per day. They ran it about six months.
Text read by machine from the scan; it may contain errors.
his city residence. During his long sojourn in California, he has visited his native State twice. In 1871 he returned with his family to the East and spent the Summer. In 1869 he purchased the farm which he now carries on, situated at San Geronimo station, Nicasio township, consisting of seven hundred acres of grazing and farming land. The San Geronimo Gold and Silver mine is located on his place. Mr. Rogers was united in marriage with Clara Walbridge, a native of Caledonia county, Vermont, in 1856. Five children have been born to them, three of whom, Nellie, Addie, and Harry
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.
Woven from the archive, old maps, post office records, the National Register and the people born here.
2 decades in the archive, from the 1850s to the 1910s. Scroll each row; tap a photo for its story.
No then-and-now pairs yet. Take a photo from the same spot as an old one and they appear here side by side.
Find the spot, match the angle, and add your photo. It becomes the first then-and-now pair on San Geronimo’s page.
Retake this view · +15Between 436 and 510 people in every census since 2000.
3 censuses, 2000–2020.
U.S. Census Bureau decennial counts, from the census table on San Geronimo’s Wikipedia page.
Each neighbor’s History grade, on the same three inputs.
The San Geronimo post office opened in 1895, the earliest record of the town by name (U.S. post office records).
What the archives can’t tell you, neighbors can.
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). How TownRatings grades history →
From Wikimedia Commons (3), 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 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.
2018