Roslyn is an unincorporated community and census-designated place in Montgomery County, Pennsylvania, United States.

[3] The first known person of European descent to settle the area was John Tyson, who bought a tract of land here in 1717.

He built lime kilns to turn the abundant local limestone into quicklime, starting an industry that operated into the late 20th century.

[3] The first rail connection to Roslyn was built by the North East Pennsylvania Railroad in 1872.

[4] Today's railroad station, which replaced the original in the late 1970s, is on SEPTA's Warminster Line.