- Plainfield (25 Companies)
- Plainville (967 Companies)
- Plymouth (5,219 Companies)
- Plympton (163 Companies)
- Pocasset (397 Companies)
- Prides Crossing (13 Companies)
- Princeton (174 Companies)
- Provincetown (1,109 Companies)
- Quincy (6,669 Companies)
- Randolph (1,881 Companies)
- Raynham (1,616 Companies)
- Raynham Center (4 Companies)
- Reading (1,454 Companies)
- Readville (6 Companies)
- Rehoboth (732 Companies)
- Revere (2,779 Companies)
- Richmond (57 Companies)
- Rochdale (105 Companies)
- Rochester (195 Companies)
- Rockland (1,710 Companies)
- Rockport (596 Companies)
- Roslindale (1,433 Companies)
- Rowe (23 Companies)
- Rowley (650 Companies)
- Roxbury (1,813 Companies)
- Roxbury Crossing (455 Companies)
- Royalston (32 Companies)
- Russell (67 Companies)
- Rutland (342 Companies)
- Sagamore (60 Companies)
- Sagamore Beach (203 Companies)
- Salem (4,290 Companies)
