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History · Delaware

Delaware’s post office opened in 1838

Most of Delaware was built recently: 5% of its homes predate 1940 and the median home dates from 1948. Below: maps from 1946 on and old-book passages.

1838first post office
0on the National Register
5%homes built before 1940
Quick answers

How Delaware began

When was Delaware founded?

1838

The Delaware post office opened in 1838, the earliest record of the town by name.

188 years
Founding year: the first Delaware post office (Blevins & Helbock, CC0).The full story ↓

What stands out about Delaware’s past

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

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

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The story

How Delaware came to be

From Wikipedia’s history of Delaware.

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Delaware was platted in 1870. An old variant name of the community was called Rei.

A post office was established at Delaware in 1838, and operated until 1933.

Text from Wikipedia, licensed CC BY-SA 4.0.

From the old history books

What they wrote about Delaware, 1884–1908

Passages that mention Delaware, cut from the printed page as they were published.

1835, when an organization was effected, and a board of directors elected. On Jan. 18, 1832, the Legislature of Delaware chartered the Wilmington and Susquehanna Railroad Company, with power to build a railroad from the Pennsylvania State line through Wilmington to the Maryland State line, towards …
History of Delaware County, Pennsylvania1884 · page 198Read the page →
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1835, when an organization was effected, and a board of directors elected. On Jan. 18, 1832, the Legislature of Delaware chartered the Wilmington and Susquehanna Railroad Company, with power to build a railroad from the Pennsylvania State line through Wilmington to the Maryland State line, towards the Susquehanna River; and on March 5, 1832, the Legislature of Maryland incorporated the Baltimore

Text read by machine from the scan; it may contain errors.
two churches, a school house, a postoffice, two stores, a hotel, asmithy and a dozen or more dwellings. Kirkwood in the southeast lies partly in Red Lion Hundred and isa station on the Delaware Railroad with a passenger and freight depot, three stores, a hotel, a school house, a postoffice, a smith…
History of the state of Delaware1908Read the page →
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two churches, a school house, a postoffice, two stores, a hotel, asmithy and a dozen or more dwellings. Kirkwood in the southeast lies partly in Red Lion Hundred and isa station on the Delaware Railroad with a passenger and freight depot, three stores, a hotel, a school house, a postoffice, a smithy and about a dozen houses. Summit Bridge lies south of the Delaware and Chesapeake canal, and is so called after a high bridge which once spanned the canal atthat point. It has a church,

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The town was laid out in 1866, and was made a station by the Delaware railroad. Baptist and congregational churches were established here in 1867, but disbanded six years later, the members Joining the churches at Magnolia.
History of the state of Delaware1908Read the page →
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The town was laid out in 1866, and was made a station by the Delaware railroad. Baptist and congregational churches were established here in 1867, but disbanded six years later, the members Joining the churches at Magnolia.

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The extension from the Pennsylvania Railroad to West Chester, which was opened Dec. 25, 1833, aroused a rivalry in Old Chester, and a number of citizens of Delaware County procured the passage of the law of April 11, 1835, incorporating the Delaware County Branch Railroad Company, authorizing the c…
History of Delaware County, Pennsylvania1884 · page 197Read the page →
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The extension from the Pennsylvania Railroad to West Chester, which was opened Dec. 25, 1833, aroused a rivalry in Old Chester, and a number of citizens of Delaware County procured the passage of the law of April 11, 1835, incorporating the Delaware County Branch Railroad Company, authorizing the construction of a railway from Chester, along the creek of the same name, to intersect at West Chester

Text read by machine from the scan; it may contain errors.

Scans and text from the Internet Archive. Books published in 1930 or earlier, which are in the public domain.

By decade

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On the map

Delaware on the map, 1946 to 1980

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

Delaware on the 1946 USGS mapDelaware on the 1961 USGS mapDelaware on the 1980 USGS map1946Pierceville sheet · 1:24,000

U.S. Geological Survey historical topographic maps (public domain), via Esri’s collection of the scans. The red ring marks the center of Delaware.

Famous people

Famous people close to Delaware

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

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Questions about Delaware’s history

What year was Delaware founded?

The Delaware post office opened in 1838, the earliest record of the town by name (U.S. post office records).

Memory lane

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

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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 Wikipedia, U.S. Geological Survey historical maps 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.