Plymouth & Brockton Street Railway
| Parent | Massachusetts Transportation Company |
|---|---|
| Founded | 1888 |
| Headquarters | 8 Industrial Park Road, Plymouth, MA, 02360 |
| Locale | Greater Boston, Southeastern Massachusetts, and Cape Cod |
| Service area | Boston |
| Service type | Regional bus service |
| Routes | 4 |
| Fuel type | Diesel |
| Chief executive | Winthrop Sargent |
| Website | p-b |
The Plymouth & Brockton Bus Company (formerly known as Plymouth & Brockton Street Railway Co.), commonly referred to as Plymouth & Brockton or simply P&B, is a private regional bus transportation company operating in Eastern Massachusetts. The company primarily operates a few routes connecting Boston with suburban communities of Southeastern Massachusetts and Cape Cod.