Its Register listing is the Root Covered Bridge. Most of Decatur Township was built recently: 6% of its homes predate 1940 and the median home dates from 1988. Below: 3 old photos and papers and maps from 1904 on.
On its age, its old homes and the National Register, Decatur Township is more historic than 47% of U.S. towns. 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 Decatur Township’s overall grade.
Ohio towns list about as much on the Register as the country (a typical Ohio town has 2.9 per 10,000 residents, the U.S. 2.4), so Decatur Township’s 6.9 sits above most of its state (69% of Ohio towns have fewer) while its 1 listings outnumber those of 51% of U.S. towns.
How sure. Graded on two of the three inputs, so a change in either one moves the letter more than it would with three. The pre-1940 share is a Census survey estimate (±10.2 points).
Founding year: our sources. 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 Decatur Township’s past
Read from the archive, the National Register and the record. The page puts what stands out first.
Lost post offices, old corners, places now gone and burying grounds
Two other post offices opened and closed inside today’s town.
Decaturville
1851–1904
Fillmore
1851–1905
18501940today
Hamlets and corners on the map
DecaturvilleFillmore
Gone or out of use
Decatur Presbyterian Churchchurch
14cemeteries and burying grounds inside Decatur Township
BoylesCentennial ChurchDecatur Methodist EpiscopalDecatur PresbyterianHarrisHatchIrelandJarvisLaddMillerMount Liberty ChapelOld Decatur ChapelQuakerSawyer
US Post Offices dataset (Blevins & Helbock, CC0). Places and cemeteries from the USGS Geographic Names Information System (2021).
On the map
Decatur Township on the map, 1904 to 2002
Every edition of the U.S. Geological Survey’s map of Decatur Township. Tap a year, or press play to watch the town change.
1904Chesterhill 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 Decatur Township.
The story so far
Decatur Township, in brief
Wikipedia doesn’t have a history of Decatur Township yet. The photos, dates and memories neighbors add here are how it gets written.
Decatur Township is one of the twenty-two townships of Washington County, Ohio, United States. The 2020 census found 1,342 people in the township.
Between the 2010 and 2020 censuses its population grew from 1,303 to 1,342 (+3%).
Intro from Wikipedia. Population: U.S. Census Bureau.
Timeline
Decatur Township, 1851 to 1940
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.
Decatur Township is more historic than 47% 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 Decatur Township?
One place: the Root Covered Bridge (listed 1975).
How old are the homes in Decatur Township?
6% of Decatur Township’s homes were built before 1940 (Census estimate, ±10.2 points), against a typical 15% for an Ohio town; the median home was built in 1988.
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 (3), the National Register of Historic Places (1), 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.