The West Jersey and Seashore Railroad (WJ&S) was a Pennsylvania Railroad subsidiary in the U.S. state of New Jersey with a connection to Philadelphia. It was formed through the merger of several smaller roads in May 1896. At the end of 1925 it operated 379 miles (610 km) of road on 717 miles (1,154 km) of track; that year it reported 166 million ton-miles of revenue freight and 332 million passenger-miles. The railroad became part of Pennsylvania-Reading Seashore Lines in 1933.

The Pennsylvania Railroad, legal name The Pennsylvania Railroad Company, also known as the "Pennsy", was an American Class I railroad that was established in 1846 and headquartered in Philadelphia. It was named for the commonwealth in which it was established. At its peak in 1882, the Pennsylvania Railroad was the largest railroad, the largest transportation enterprise, and the largest corporation in the world.