Member Agencies
| Department | Local # | MASSCOP Area |
| Acton Superior Officers | 380 | 3 |
| Adams Police Association | 367 | 12 |
| Ashland Individual Members | 050 | 4 |
| Attleboro Police Association | 352 | 1 |
| Auburn Police | 388 | 7 |
| Auburn Dispatchers | 388A | 7 |
| Auburn Superior Officers | 388B | 7 |
| Barre Police Association | 340 | 7 |
| Barnstable Police Patrolman's Union | 395 | 11 |
| Bellingham FOP Lodge. 8 | 216 | 4 |
| Berlin Police Union | 264 | 5 |
| Bolton Police Association | 286 | 5 |
| Bolton Dispatchers Association | 286A | 5 |
| Boston Housing Superiors | 214 | 9 |
| Boxborough Dispatchers Union | 200A | 5 |
| Boxborough Police Unit | 200 | 5 |
| Braintree Patrolman's Club | 365 | 9 |
| Brewster Police Union | 332 | 11 |
| Burlington Police Patrolman's Association | 342 | 3 |
| Canton Police Association | 374 | 9 |
| Carlisle Police Unit | 201 | 3 |
| Carlisle Dispatchers Association | 201A | 3 |
| Chatham Sergeants & Patrol Officers | 294 | 11 |
| Clinton Police Union | 151 | 5 |
| Concord Police Association | 260 | 3 |
| Dalton Police Officers Union | 906 | 12 |
| Dighton Police Association | 306 | 1 |
| Douglas Police Association | 150 | 6 |
| Dover Police Association | 322 | 2 |
| Duxbury Police Commanders | 376 | 7 |
| East Bridgewater Police Association | 60 | 1 |
| Easton Police Association | 314 | 2 |
| Edgartown Police Officers Association | 336 | 11 |
| Essex Police Association | 270 | 8 |
| Fall River Police Association | 1854 | FR |
| Foxborough Police Union | 384 | 2 |
| Gloucester Patrol Officers | 342 | 2 |
| Gloucester Superior Officers | 190 | 8 |
| Great Barrington Police Association | 350 | 12 |
| Halifax Police Association | 292 | 1 |
| Hamilton Police Benevolent Association | 318 | 8 |
| Harvard Police Unit | 202 | 5 |
| Holliston Police Association | 160 | 4 |
| Hopedale Police Association | 164 | 4 |
| Hopedale Dispatchers Association | 164A | 4 |
| Hopkinton Police Association | 254 | 4 |
| Hopkinton Dispatchers | 254A | 4 |
| Ipswich Police Association | 310 | 8 |
| Kingston Police Superior's | 386 | 11 |
| Lakeville Police Association | 304 | 1 |
| Lancaster Police Perm. Officer | 203 | 5 |
| Lancaster Dispatch Unit | 203A | 5 |
| Lanesborough Police Local | 390 | 12 |
|
Lee Police Association Local |
396 | 12 |
| Leicester Police Alliance | 168 | 7 |
| Leicester Police Employees | 168A | 7 |
| Lenox Patrol Association | 362 | 12 |
| Leominster Patrolmen's Union | 364 | 5 |
| Leominster Superior Officers | 282 | 5 |
| Lincoln Police Association | 197 | 3 |
| Littleton Police Unit | 204 | 5 |
| Littleton Dispatch Unit | 204A | 5 |
| Lynn Police Association | 302 | Lynn |
| Mansfield Police Association | 298 | 2 |
| Marlborough Command Officers | 366 | 4 |
| Marion Police Brotherhood | 312 | 1 |
| Mashpee Police Sergeants | 320 | 11 |
| Mashpee Police Association | 324 | 11 |
| M.B.T.A. Superior Officers | 354 | 9 |
| Medfield Police Association | 257 | 2 |
| Mendon Police Association | 188 | 4 |
| Mendon Employee's Association | 188A | 4 |
| Methuen Police Local | 394 | 3 |
| Middleton Police Local | 392 | 8 |
| Milford Police Relief Association | 218 | 4 |
| Millbury Police Association | 128 | 6 |
| Millis Police Association | 171 | 2 |
| Nahant Police Association | 194 | 8 |
| Nantucket Police Officer's Union | 330 | 11 |
| Newbury Police Association | 356 | 8 |
| North Adams | 382 | 12 |
| North Attleboro Patrol Officers | 342 | 2 |
| North Attleboro Superiors | 280 | 2 |
| Northborough Patrolman's Association | 165 | 6 |
| Northborough Police Sergeant's | 165A |