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History · Millbrook Township

Millbrook Township’s post office opened in 1878, and 24% of its homes were built before 1940

Its Register listing is the Harry Keith Barn.

1878first post office
1on the National Register
24%homes built before 1940
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Quick answers

How Millbrook Township began

When was Millbrook Township founded?

1878

The Millbrook Township post office opened in 1878, the earliest record of the town by name. Two smaller post offices, Millbrook (1878) and Turnerville (1883), opened inside today’s town and later closed.

2020 census: 90148 years
Founding year: the first Millbrook Township post office (Blevins & Helbock, CC0).
On the National Register

1 historic place in Millbrook Township

The country’s official list of buildings and places worth saving.

place listed
1
National Historic Landmarks
0
none yet
historic buildings protected
1
each building in a district counts
first listed
2013
Harry Keith Barn
Harry Keith Barn, built 1940
Buildings
Harry Keith BarnBuilt 1940

National Park Service, National Register of Historic Places. Photos from Wikimedia Commons, credited on each place’s page.

Places that used to be

Lost post offices, old corners, places now gone and burying grounds

Two other post offices opened and closed inside today’s town.

Millbrook
1878–1889
Turnerville
1883–1889
Penokee
1889–today
18701950today
Hamlets and corners on the map
Penokee
Gone or out of use
MillbrooklocaleTurnervillelocale
2cemeteries and burying grounds inside Millbrook Township
Brush CreekPenokee

US Post Offices dataset (Blevins & Helbock, CC0). Places and cemeteries from the USGS Geographic Names Information System (2021).

Stories next door

History across the town line

Each neighbor’s History grade, on the same three inputs.

Gettysburg Township1 historic placenot graded: under 1,000 residents or part of its townHill City TownshipIts storynot graded: under 1,000 residents or part of its townWildhorse TownshipIts storynot graded: under 1,000 residents or part of its townHappy TownshipIts storynot graded: under 1,000 residents or part of its townSolomon TownshipIts storynot graded: under 1,000 residents or part of its townMorlan TownshipIts storynot graded: under 1,000 residents or part of its town

Questions about Millbrook Township’s history

What year was Millbrook Township founded?

The Millbrook Township post office opened in 1878, the earliest record of the town by name (U.S. post office records).

What is on the National Register in Millbrook Township?

One place: the Harry Keith Barn (listed 2013).

Memory lane

What the archives can’t tell you, neighbors can.

Town Square →
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Sources

Where this page comes from

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 the National Register of Historic Places (1), 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.