Pennsylvania-New York boundary marker

Seaward Road north of Cooks Farm

Boundary between Pennsylvania and New York


Photo taken by Brian Manville on May 26, 2018




The New York–Pennsylvania border is the state line between the U.S. states of New York and Pennsylvania. This marks the 42nd parallel north to the corner of the Erie Triangle.

The survey of the 42nd parallel north was carried out in 1785–86 and accepted by the two states in 1787. The surveying technique that was used at the time was not especially accurate, and as such, this boundary wanders a bit on both sides of the true parallel.

Update Log 

  • May 27, 2018: Added by Brian Manville


  • Brian Manville