The Cadiz post office opened in 1849, the earliest record of the town by name. Two smaller post offices, Martin (1870) and Martintown (1892), opened inside today’s town and later closed.
2020 census: 747177 years
Founding year: the first Cadiz post office (Blevins & Helbock, CC0).The full story ↓
What stands out about Cadiz’s past
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The earliest white settlers of the area were from the lead mining regions of the state, farther west. The first settler of Cadiz was George Lot, originally from the State of Pennsylvania, who settled on the southeastern quarter of section 36 in 1834. He came directly from the mines, where he had been previous to the Black Hawk War. He stayed for a short time, then moved on to nearby Winslow, Illinois. Soon after Lot came ex-miners William Boyles (who would later name Green County) from Indiana, and Stephen G. Hale, Nicholas Hale and Bennett Nolan from Illinois. Abner Van Sant and his son-in-law, John Deniston, built a sawmill in the area in 1843, and laid out the community a few years later. Cadiz was named for a city in Spain.
Passages that mention Cadiz, cut from the printed page as they were published.
History of Green County, Wisconsin1884 · page 879Read the page →
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M. and Chester M. Mr. and Mrs. Worrick remained in Pennsylvania until 1866, when they came to this county and first settled in the town of Cadiz, and lived for one year, then bought a farm on section 35, town of Jefferson, containing eighty acres. He died Aug. 9, 1873, leaving one child — George — who carries on the farm. The widow now owns ninety-one acres,
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History of Green County, Wisconsin1884 · page 89Read the page →
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At the village of Martin, on the southeast quarter of section 82, in township 1 north, of range 6 east (town of Cadiz, Green county), on the Pecatonica river, at the saw-mill, is a large stone quarry, of which the upper portion consists of Galena limestone in thin beds, containing considerable calcareous sand between the layers.
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History of Green County, Wisconsin1877 · page 153Read the page →
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History of Green County. 153 in the village of Cadiz, on Honey creek, was built in 1844 by Van Sant and Deniston. Mr. Vatf Sant hoped to build up there a manufacturing town, for which he chose the Spanish name of Cadiz ; but both he and Mr.
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Scans and text from the Internet Archive. Books published in 1930 or earlier, which are in the public domain.
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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 Wikipedia, U.S. Geological Survey historical maps, 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.
