Cornwall is a borough in Lebanon County, Pennsylvania, United States.

Grubb wrote to Philadelphia and in 1734 was granted a warrant to purchase 300 acres (1.2 km2) of land.

[5] In 1742, Peter built a cold blast furnace and named it Cornwall, after his father's birthplace in England.

The operation also included the Hopewell Forges on nearby Hammer Creek.

Peter Grubb did not stay long to run the operation, but leased it out in 1745 for 20 years and returned to Wilmington, Delaware.

In 1932 the Coleman family deeded the property to the Commonwealth of Pennsylvania and it is now a designated National Historic Landmark open to the public.

At the time it officially became a borough, it comprised six widely separated villages.

[8] Alden Villa was added to the National Register of Historic Places in 2011.