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History · New Seabury

New Seabury’s post office opened in 1868

Most of New Seabury was built recently: 0.9% of its homes predate 1940 and the median home dates from 1986. Below: maps from 1888 on.

1868first post office
0on the National Register
0.9%homes built before 1940
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Photo: John Phelan · CC BY-SA 3.0
Quick answers

How New Seabury began

When was New Seabury founded?

1868

The New Seabury post office opened in 1868, the earliest record of the town by name.

2020 census: 852158 years
Founding year: the first New Seabury post office (Blevins & Helbock, CC0).

What stands out about New Seabury’s past

Read from the archive, the National Register and the record. The page puts what stands out first.

A history waiting to be writtenNo old photos of New Seabury are in the public archives yet. The rest are in attics and albums.On the map since 18885 editions of the USGS map, 1888 to 1974. Watch New Seabury change.
★ What stands out · Help out

Start New Seabury’s collection

The first neighbors to add old photos shape how New Seabury’s history is told.

Decades since 1900 with photos
00s10s20s30s40s50s60s70s80s90s
0 of 10 decades. The empty ones are waiting for someone’s album.
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On the map

New Seabury on the map, 1888 to 1974

Every edition of the U.S. Geological Survey’s map of New Seabury. Tap a year, or press play to watch the town change.

New Seabury on the 1888 USGS mapNew Seabury on the 1893 USGS mapNew Seabury on the 1949 USGS mapNew Seabury on the 1961 USGS mapNew Seabury on the 1974 USGS map1888Barnstable 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 New Seabury.

The story so far

New Seabury, in brief

Wikipedia doesn’t have a history of New Seabury yet. The photos, dates and memories neighbors add here are how it gets written.

New Seabury is a census-designated place (CDP) in the town of Mashpee in Barnstable County, Massachusetts, United States, on Cape Cod. The area consists primarily of summer homes for wealthy families. Attractions include a county club and the Fells Pond, Daniels Island, and Littleneck Bay neighborhoods. As of the 2020 census, New Seabury had a population of 852. The community is located on the historic home of the Wampanoag Nation. The New Seabury area is often extended to include Popponesset and Popponesset Island, which are only accessible by road through New Seabury and are part of the New Seabury development, but are grouped separately for Census purposes.

Its first post office opened in 1868. Between the 2010 and 2020 censuses its population grew from 717 to 852 (+19%).

Intro from Wikipedia. Population: U.S. Census Bureau.

By decade

New Seabury, decade by decade

Today2 recent
Popponesset Marketplace2012Popponesset MarketplaceMashpee Congregational Church2012Mashpee Congregational Church
Famous people

Famous people close to New Seabury

Nobody well known was born in New Seabury itself, so here are the best known from just nearby.

See all →
Casey AffleckAmerican actor · b. 1975
K
Katharine Lee BatesAmerican poet and songwriter · b. 1859
Mercy Otis WarrenAmerican writer · b. 1728
James OtisLawyer in colonial Massachusetts · b. 1725
J
Jessica DubroffAmerican child pilot trainee · b. 1988
Gustavus Franklin SwiftAmerican entrepreneur in the meat industry · b. 1839
Stories next door

History across the town line

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

Popponesset IslandIts storynot graded: under 1,000 residents or part of its townPopponessetIts storynot graded: under 1,000 residents or part of its townMashpee2 historic placesB−

Questions about New Seabury’s history

What year was New Seabury founded?

The New Seabury post office opened in 1868, the earliest record of the town by name (U.S. post office records).

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 Wikimedia Commons (2) and U.S. Geological Survey historical maps. Archive images are copied here with their credits and licenses, shown on each photo’s page. Refreshed monthly.