There were two settlements in Mitchell County with the name Walnut Grove. The first was in Hayes Township with a post office from 1876 to 1881. In 1886, Walnut Grove in Bloomfield Township was issued a post office. This post office was renamed Walnutgrove in 1894, then discontinued in 1901.
Every edition of the U.S. Geological Survey’s map of Walnut Grove Township. Tap a year, or press play to watch the town change.
1948Erie sheet · 1:62,500
U.S. Geological Survey historical topographic maps (public domain), via Esri’s collection of the scans. The red ring marks the center of Walnut Grove Township.
Famous people
Famous people close to Walnut Grove Township
Nobody well known was born in Walnut Grove Township itself, so here are the best known from just nearby.
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) 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.