- Plainfield (25 Companies)
- Plainville (965 Companies)
- Plymouth (5,208 Companies)
- Plympton (162 Companies)
- Pocasset (396 Companies)
- Prides Crossing (13 Companies)
- Princeton (174 Companies)
- Provincetown (1,107 Companies)
- Quincy (6,656 Companies)
- Randolph (1,879 Companies)
- Raynham (1,613 Companies)
- Raynham Center (4 Companies)
- Reading (1,451 Companies)
- Readville (6 Companies)
- Rehoboth (729 Companies)
- Revere (2,777 Companies)
- Richmond (57 Companies)
- Rochdale (105 Companies)
- Rochester (195 Companies)
- Rockland (1,710 Companies)
- Rockport (595 Companies)
- Roslindale (1,428 Companies)
- Rowe (23 Companies)
- Rowley (647 Companies)
- Roxbury (1,810 Companies)
- Roxbury Crossing (455 Companies)
- Royalston (32 Companies)
- Russell (67 Companies)
- Rutland (342 Companies)
- Sagamore (60 Companies)
- Sagamore Beach (202 Companies)
- Salem (4,288 Companies)
