The Providence, Warren and Bristol Railroad was a railroad in Rhode Island that connected the city of Providence with Bristol, Rhode Island.
The company was formed in 1854 by merging the Providence, Warren and Bristol Railroad Companies of Massachusetts and Rhode Island. The 14.1-mile line itself was completed on July 12, 1855.
Until 1862, a portion of the line crossed through part of the town of Seekonk, Massachusetts, which then became East Providence, Rhode Island as part of a boundary settlement between the two states.
In 1865, the Fall River, Warren and Providence Railroad built a branch off the line at Warren; in 1875, it was extended to Fall River, Massachusetts.
On July 1, 1891, the line was leased to the Old Colony Railroad for 99 years.
In 1893, the PW&B was absorbed into the New York, New Haven and Hartford Railroad, upon its lease of the Old Colony Railroad system.
In 1992, the PW&B right-of-way opened as the East Bay Bike Path.