Paul's Bridge is a stone bridge carrying the Neponset Valley Parkway over the Neponset River between Milton and southern Boston, Massachusetts. It was built in 1849 by Thomas Hollis, Jr., of Milton, but was later reconstructed using the original materials. It replaced the earlier Hubbard's Bridge (built prior to 1759), and a subsequent Paul's Bridge (so named at its 1807 reconstruction). Its current span is approximately 88 feet (27 m). The name "Paul" can be attributed to Samuel Paul, the owner of the adjacent land on the Readville (now Boston) side, which was part of Dedham at the time of the bridge's construction.

The 1849 bridge was 81 feet (25 m) long and 22 feet (6.7 m) wide, and was constructed of unmortared Quincy granite. Each round arch measures 20 feet (6.1 m) at the springline. The area between the arches is uncoursed rubblestone, and the arches are formed out of cut granite voussoirs. The bridge underwent a major rebuilding between 1932 and 1935 under the leadership of Arthur A. Shurcliff, FASLA and founder of the AIP, who made it a priority to widen the bridge. Most of the original stone was reused and solid stone parapets replaced the wooden side rails. Instead of a rubblestone finish between the arches on the extended side, it is finished in coursed stone.

Paul's Bridge was added to the National Register of Historic Places in 1972, and contributes to a historic district encompassing the Neponset River Parkway. It is located within the Neponset River Reservation, and is maintained by the Massachusetts Department of Conservation and Recreation.

• National Register of Historic Places listings in Milton, Massachusetts
• National Register of Historic Places listings in southern Boston, Massachusetts
• List of bridges on the National Register of Historic Places in Massachusetts