| 1 | Worcester city (northwest) | 9,258 |
| 2 | South Lancaster CDP | 8,470 |
| 3 | Unincorporated (southeast 6) | 8,322 |
| 4 | Unincorporated (north-northwest 2) | 8,289 |
| 5 | Unincorporated (south-southwest 5) | 8,249 |
| 6 | Unincorporated (north 3) | 8,111 |
| 7 | Upton CDP | 8,095 |
| 8 | Lunenburg CDP (west-northwest) | 7,888 |
| 9 | Worcester city (south-southeast 2) | 7,867 |
| 10 | Worcester city (west 1) | 7,830 |
| 11 | Unincorporated (south 5) | 7,753 |
| 12 | Leominster city (south) | 7,649 |
| 13 | Unincorporated (north-northeast 5) | 7,459 |
| 14 | Worcester city (east-southeast 1) | 7,426 |
| 15 | Whitinsville CDP (north-northeast) | 7,061 |
| 16 | Webster CDP (east-northeast) | 6,943 |
| 17 | Unincorporated (southeast 3) | 6,939 |
| 18 | Worcester city (north 1) | 6,927 |
| 19 | Worcester city (north-northwest 1) | 6,866 |
| 20 | Fitchburg city (south) | 6,762 |
| 21 | Unincorporated (east-northeast 5) | 6,604 |
| 22 | Unincorporated (northeast 1) | 6,591 |
| 23 | Worcester city (southwest 3) | 6,546 |
| 24 | Unincorporated (west-southwest 2) | 6,507 |
| 25 | Northborough CDP (west) | 6,499 |
| 26 | Unincorporated (west-southwest 1) | 6,441 |
| 27 | South Ashburnham CDP | 6,357 |
| 28 | Whitinsville CDP (south-southwest) | 6,339 |
| 29 | Unincorporated (east-southeast 1) | 6,266 |
| 30 | Unincorporated (east-southeast 5) | 6,249 |
| 31 | Unincorporated (southeast 5) | 6,198 |
| 32 | Gardner city (north-northeast) | 6,190 |
| 33 | Worcester city (north 3) | 6,152 |
| 34 | Worcester city (north-northeast 2) | 6,133 |
| 35 | Hopedale CDP | 6,024 |
| 36 | Northborough CDP (east-northeast) | 6,015 |
| 37 | Leominster city (north 2) | 5,997 |
| 38 | Unincorporated (southeast 7) | 5,996 |
| 39 | Worcester city (south-southwest 3) | 5,903 |
| 40 | Unincorporated (east 2) | 5,896 |
| 41 | East Douglas CDP | 5,891 |
| 42 | Leominster city (northwest 1) | 5,824 |
| 43 | Rutland CDP (north-northwest) | 5,735 |
| 44 | Cordaville CDP (west-southwest) | 5,706 |
| 45 | Worcester city (east-southeast 3) | 5,700 |
| 46 | Unincorporated (north-northeast 2) | 5,698 |
| 47 | Oxford CDP | 5,596 |
| 48 | Unincorporated (east-northeast 3) | 5,552 |
| 49 | Worcester city (southwest 4) | 5,552 |
| 50 | Barre CDP | 5,535 |
| 51 | Spencer CDP | 5,520 |
| 52 | Milford CDP (west) | 5,504 |
| 53 | Unincorporated (north-northwest 3) | 5,495 |
| 54 | Unincorporated (northwest 4) | 5,371 |
| 55 | Worcester city (south 2) | 5,345 |
| 56 | Unincorporated (south-southeast 3) | 5,285 |
| 57 | Milford CDP (east) | 5,268 |
| 58 | Worcester city (north 2) | 5,264 |
| 59 | Unincorporated (east-southeast 4) | 5,230 |
| 60 | Fitchburg city (north-northwest) | 5,125 |
| 61 | Unincorporated (southwest 2) | 5,110 |
| 62 | Unincorporated (east-southeast 3) | 5,090 |
| 63 | Leominster city (east) | 5,034 |
| 64 | Clinton CDP (south-southwest) | 5,031 |
| 65 | Worcester city (south-southwest 2) | 5,020 |
| 66 | Southbridge Town city (north) | 5,014 |
| 67 | Unincorporated (west-northwest 1) | 4,996 |
| 68 | Warren CDP | 4,981 |
| 69 | Worcester city (south-southeast 1) | 4,954 |
| 70 | Gardner city (west-northwest) | 4,951 |
| 71 | Unincorporated (north 2) | 4,942 |
| 72 | Unincorporated (north-northeast 3) | 4,896 |
| 73 | Unincorporated (northwest 5) | 4,875 |
| 74 | Unincorporated (east-northeast 2) | 4,857 |
| 75 | Worcester city (northeast) | 4,808 |
| 76 | Unincorporated (east-southeast 2) | 4,793 |
| 77 | Baldwinville CDP | 4,744 |
| 78 | North Brookfield CDP | 4,739 |
| 79 | Cordaville CDP (east-northeast) | 4,735 |
| 80 | Winchendon CDP (east-southeast) | 4,734 |
| 81 | Fitchburg city (north) | 4,702 |
| 82 | Milford CDP (northwest) | 4,691 |
| 83 | Athol CDP (southwest) | 4,664 |
| 84 | Worcester city (east 4) | 4,662 |
| 85 | Leominster city (west-southwest) | 4,632 |
| 86 | Fiskdale CDP | 4,622 |
| 87 | Unincorporated (south 4) | 4,616 |
| 88 | Unincorporated (east-northeast 4) | 4,610 |
| 89 | Fitchburg city (east-southeast 2) | 4,582 |
| 90 | Unincorporated (west-southwest 3) | 4,569 |
| 91 | Southbridge Town city (south-southeast) | 4,562 |
| 92 | Worcester city (east-southeast 2) | 4,558 |
| 93 | Milford CDP (south-southwest) | 4,490 |
| 94 | Unincorporated (northeast 3) | 4,430 |
| 95 | Unincorporated (north-northeast 4) | 4,371 |
| 96 | Unincorporated (northwest 6) | 4,339 |
| 97 | Worcester city (east-northeast 2) | 4,303 |
| 98 | Unincorporated (south-southwest 3) | 4,300 |
| 99 | Worcester city (southeast 3) | 4,260 |
| 100 | Worcester city (west-northwest 2) | 4,253 |
| 101 | Westborough CDP | 4,234 |
| 102 | Unincorporated (south 1) | 4,213 |
| 103 | Milford CDP (south-southeast) | 4,211 |
| 104 | Unincorporated (north-northwest 1) | 4,144 |
| 105 | Worcester city (southeast 1) | 4,139 |
| 106 | Worcester city (north-northwest 3) | 4,126 |
| 107 | Worcester city (south 1) | 4,087 |
| 108 | Webster CDP (south-southwest) | 4,084 |
| 109 | Leominster city (southeast) | 4,066 |
| 110 | Winchendon CDP (north-northeast) | 4,026 |
| 111 | Worcester city (west-northwest 3) | 4,025 |
| 112 | Worcester city (east 1) | 4,011 |
| 113 | Unincorporated (southeast 4) | 3,981 |
| 114 | Gardner city (south-southeast) | 3,952 |
| 115 | Gardner city (southwest) | 3,945 |
| 116 | Worcester city (west 2) | 3,926 |
| 117 | Worcester city (west 3) | 3,924 |
| 118 | Lunenburg CDP (east-southeast) | 3,916 |
| 119 | Unincorporated (south-southwest 1) | 3,867 |
| 120 | Clinton CDP (east-northeast) | 3,843 |
| 121 | Worcester city (north-northeast 3) | 3,839 |
| 122 | West Brookfield CDP | 3,830 |
| 123 | Webster CDP (north) | 3,758 |
| 124 | Fitchburg city (northeast 1) | 3,741 |
| 125 | Athol CDP (south-southeast) | 3,716 |
| 126 | Worcester city (east 3) | 3,711 |
| 127 | Unincorporated (east-northeast 1) | 3,707 |
| 128 | Unincorporated (north-northeast 1) | 3,672 |
| 129 | Fitchburg city (west-southwest 2) | 3,671 |
| 130 | Worcester city (southwest 2) | 3,644 |
| 131 | Unincorporated (east 1) | 3,639 |
| 132 | Worcester city (west-southwest 1) | 3,630 |
| 133 | Unincorporated (west) | 3,596 |
| 134 | Athol CDP (north) | 3,557 |
| 135 | Unincorporated (northeast 4) | 3,548 |
| 136 | Unincorporated (north-northwest 4) | 3,500 |
| 137 | Rutland CDP (south-southeast) | 3,467 |
| 138 | Unincorporated (northwest 1) | 3,443 |
| 139 | Brookfield CDP | 3,442 |
| 140 | Sturbridge CDP | 3,431 |
| 141 | Unincorporated (south 2) | 3,373 |
| 142 | Unincorporated (north-northeast 6) | 3,311 |
| 143 | Fitchburg city (west) | 3,262 |
| 144 | Southbridge Town city (northwest) | 3,205 |
| 145 | Unincorporated (south-southeast 2) | 3,205 |
| 146 | Unincorporated (south-southeast 1) | 3,185 |
| 147 | Northborough CDP (south-southeast) | 3,180 |
| 148 | Milford CDP (southeast) | 3,177 |
| 149 | Unincorporated (southeast 1) | 3,156 |
| 150 | Fitchburg city (west-southwest 1) | 3,097 |
| 151 | Unincorporated (south 3) | 3,067 |
| 152 | Worcester city (east 2) | 3,067 |
| 153 | Worcester city (north-northwest 2) | 2,989 |
| 154 | Worcester city (east-northeast 3) | 2,985 |
| 155 | Milford CDP (north) | 2,963 |
| 156 | Unincorporated (east-southeast 6) | 2,958 |
| 157 | Leominster city (south-southeast) | 2,955 |
| 158 | Fitchburg city (east-southeast 1) | 2,907 |
| 159 | Worcester city (east-northeast 1) | 2,894 |
| 160 | Webster CDP (west) | 2,889 |
| 161 | Clinton CDP (north-northwest) | 2,884 |
| 162 | Worcester city (west-southwest 2) | 2,862 |
| 163 | Unincorporated (north 1) | 2,790 |
| 164 | Worcester city (south-southeast 3) | 2,731 |
| 165 | Southbridge Town city (southwest) | 2,730 |
| 166 | Unincorporated (south-southwest 4) | 2,692 |
| 167 | Leominster city (north 1) | 2,652 |
| 168 | Unincorporated (south-southwest 2) | 2,598 |
| 169 | Worcester city (southwest 1) | 2,549 |
| 170 | Unincorporated (northeast 2) | 2,543 |
| 171 | Worcester city (south-southwest 1) | 2,543 |
| 172 | Leominster city (northeast) | 2,518 |
| 173 | Devens CDP | 2,510 |
| 174 | Worcester city (south-southwest 4) | 2,504 |
| 175 | Leominster city (northwest 2) | 2,370 |
| 176 | Southbridge Town city (east-northeast) | 2,295 |
| 177 | Fitchburg city (south-southwest) | 2,244 |
| 178 | Worcester city (west-northwest 1) | 2,203 |
| 179 | East Brookfield CDP | 2,120 |
| 180 | Worcester city (north-northeast 1) | 2,062 |
| 181 | Gardner city (east-southeast) | 2,037 |
| 182 | Unincorporated (northwest 3) | 1,915 |
| 183 | Worcester city (southeast 2) | 1,902 |
| 184 | Unincorporated (southwest 1) | 1,836 |
| 185 | Unincorporated (southeast 2) | 1,675 |
| 186 | Winchendon CDP (west-southwest) | 1,632 |
| 187 | Unincorporated (west-northwest 2) | 1,623 |
| 188 | Worcester city (south-southwest 5) | 1,561 |
| 189 | Fitchburg city (northeast 2) | 1,540 |
| 190 | Unincorporated (northwest 2) | 1,500 |
| 191 | Petersham CDP | 1,173 |