15
- 01501 Auburn
- 01503 Berlin
- 01504 Blackstone
- 01505 Boylston
- 01506 Brookfield
- 01507 Charlton
- 01510 Clinton
- 01515 East Brookfield
- 01516 Douglas
- 01518 Fiskdale
- 01519 Grafton
- 01520 Holden
- 01521 Holland
- 01522 Jefferson
- 01523 Lancaster
- 01524 Leicester
- 01525 Linwood
- 01527 Millbury
- 01529 Millville
- 01531 New Braintree
- 01532 Northborough
- 01534 Northbridge
- 01535 North Brookfield
- 01536 North Grafton
- 01537 North Oxford
- 01540 Oxford
- 01541 Princeton
- 01542 Rochdale
- 01543 Rutland
- 01545 Shrewsbury
- 01550 Southbridge
- 01560 South Grafton
- 01561 South Lancaster
- 01562 Spencer
- 01564 Sterling
- 01566 Sturbridge
- 01568 Upton
- 01569 Uxbridge
- 01570 Webster
- 01571 Dudley
- 01581 Westborough
- 01583 West Boylston
- 01585 West Brookfield
- 01588 Whitinsville
- 01590 Sutton