
The Erie Triangle is a roughly 300-square-mile (780-square-kilometre) tract of American land that was the subject of several competing
colonial
Colonial or The Colonial may refer to:
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* Colonial (1920 a ...
-era claims. It was eventually acquired by the U.S. federal government and sold to
Pennsylvania so that the state would have access to a freshwater port on
Lake Erie. The Erie Triangle land makes up a large portion of present-day
Erie County, Pennsylvania
Erie County is a county in the Commonwealth of Pennsylvania. It is the northernmost county in Pennsylvania. As of the 2020 census, the population was 270,876. Its county seat is Erie. The county was created in 1800 and later organized in 1803.
...
.
Background

Most of northwestern Pennsylvania came under American control following the 1784
Treaty of Fort Stanwix with the
Iroquois Confederacy
The Iroquois ( or ), officially the Haudenosaunee ( meaning "people of the longhouse"), are an Iroquoian-speaking confederacy of First Nations peoples in northeast North America/ Turtle Island. They were known during the colonial years to ...
. The following year, a boundary dispute between
New York
New York most commonly refers to:
* New York City, the most populous city in the United States, located in the state of New York
* New York (state), a state in the northeastern United States
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and Pennsylvania erupted. Following a surveying effort by
Andrew Ellicott
Andrew Ellicott (January 24, 1754 – August 28, 1820) was an American land surveyor who helped map many of the territories west of the Appalachians, surveyed the boundaries of the District of Columbia, continued and completed Pierre (Pete ...
representing the Pennsylvanians and
James Clinton and
Simeon DeWitt
Simeon De Witt (December 25, 1756 – December 3, 1834) was Geographer and Surveyor General of the Continental Army during the American Revolution and Surveyor General of the State of New York for the fifty years from 1784 until his death.
Life ...
representing the New Yorkers, the western edge of New York was set at east of Pennsylvania's
Presque Isle, a small peninsula off the coast of
Erie, Pennsylvania. However, this left an unclaimed area, which came to be known as the Triangle Lands.
The Triangle Lands problematically fell under neither New York's nor Pennsylvania's charter, while both
Connecticut and
Massachusetts also spoke up with claims derived from their original colonial "sea to shining sea" grants.
Of these four competing claimants (Pennsylvania, New York, Connecticut, and Massachusetts), only Pennsylvania was landlocked, except for a very tiny strip of coastline 3.75 miles in length. Following some pressure from the new
federal government
A federation (also known as a federal state) is a political entity characterized by a union of partially self-governing provinces, states, or other regions under a central federal government (federalism). In a federation, the self-governin ...
, all four states surrendered their claims to that entity, which then, in 1792, sold final rights to the of land to Pennsylvania for $151,640.25 (75 ¢/acre). The
Six Nations of the Iroquois Confederacy released the land to Pennsylvania in January 1789 for payments of $2,000 from Pennsylvania and $1,200 from the federal government. The
Seneca Nation
The Seneca Nation of Indians is a federally recognized Seneca tribe based in western New York. They are one of three federally recognized Seneca entities in the United States, the others being the Tonawanda Band of Seneca (also in western New Y ...
separately settled land claims against Pennsylvania in February 1791 for the sum of $800.
This was accomplished without the approval of the federal government and in violation of the
Contract Clause of the
United States Constitution
The Constitution of the United States is the Supremacy Clause, supreme law of the United States, United States of America. It superseded the Articles of Confederation, the nation's first constitution, in 1789. Originally comprising seven ar ...
which reserved the right to make treaties to the federal government.
With this access to the Great Lakes, Pennsylvania was persuaded to accept the western boundary
established by the
Surveyor General of the Northwest Territory following passage of the
Northwest Ordinance
The Northwest Ordinance (formally An Ordinance for the Government of the Territory of the United States, North-West of the River Ohio and also known as the Ordinance of 1787), enacted July 13, 1787, was an organic act of the Congress of the Co ...
in 1787.
The Erie Triangle is often described as a "tab" or "chimney" attached to the
Keystone State. The water off the coast of the Erie Triangle is known as the ''Graveyard of Lake Erie'' because of the large number of shipwrecks that occurred in the area's stormy waters in the 18th and 19th centuries. It was also the site of a preliminary battle between forces that participated in the
Battle of Lake Erie during the
War of 1812. The battle itself took place in the
Lake Erie Islands, at the western end of the lake, off the coast of
Ohio.
See also
*
Twin Tiers
**
Northern Tier
**
Southern Tier
The Southern Tier is a geographic subregion of the broader Upstate New York region of New York State, consisting of counties west of the Catskill Mountains in Delaware County and geographically situated along or very near the northern border ...
*
New York–Pennsylvania border
*
Pennamite–Yankee War
References
External links
Explore PA Historyh1>
Further reading
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*
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{{American panhandles
Border irregularities of the United States
Former regions and territories of the United States
History of Pennsylvania
Geography of Erie County, Pennsylvania
Internal territorial disputes of the United States