| ZIP Codes: | 98 ZIP Codes (77 Standard, 18 PO Box, 3 Unique) [See All] |
| Area Codes: | 351 / 413 / 508 / 774 / 978 |
| Timezone: | Eastern (GMT -05:00) |
| Local Time: | 2:12:28 PM |
| Population: | 865,975 [See All] |
| FIPS: | 25027 |
| CBSA: | Worcester, MA |
| Land Area: | 1,543 sq mi |
| Water Area: | 53 sq mi |
| Coordinates: | 42.2970, -71.8502 |
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865,975 residents live across 98 ZIPs covering 1,543 sq mi, served by 82 distinct USPS-recognized cities.
Population moved from 804,579 to 865,975 from 2014 to 2024 — a +7.6% change. 62 ZIPs gained residents, 22 lost.
The county's wealthiest ZIP 01451 (Harvard, $214,792 median) and poorest ZIP 01608 (Worcester, $45,687) are 19.9 miles apart — a 4.7× income gap across local geography.
Median home values vary 5.6× across this county — from $153,600 in 01608 (Worcester) to $856,200 in 01451 (Harvard).
Density varies 556× across the county — from 27 people/sq mi in 01366 (Petersham) to 15,078 in 01610 (Worcester).
Most of the decade's growth concentrated around Worcester — top growth ZIPs averaged +41.4% over the past ten years ( 01542 , 01608 and 01610 ).
Educational attainment ranges from 18.8% bachelor's+ in 01610 (Worcester) to 81.9% in 01740 (Bolton) — the breadth of educational profiles across the area.
Within Massachusetts, this is the #2 most populous of 14 counties and ranks #7 for median household income with the #4 fastest decade growth .
On the national stage, Worcester County is the #67 most populous US county .
Hosts 3 single-entity Unique ZIPs: 01441Westminster ; 01653Worcester ; and 01546Central Mass P & D Ctr .
Weighted by population, the typical household earns about $101,517 across the county — reflecting what a typical resident sees, not a simple ZIP average.
39.7% of adults age 25+ hold a bachelor's degree or higher (241,283 of 607,431 reporting).
77 Standard delivery, 18 PO Box only, 3 single-entity Unique ZIPs serve this county.
8 ZIPs in this county where more than 60% of adults 25+ hold a bachelor's degree — typically college campuses, research enclaves, or tech corridors.
3 ZIP codes in this county serve a single facility — typically theme parks, universities, large corporations, airports, or government complexes.
Median household income spans 4.7× between the wealthiest and poorest ZIPs — a sign of significant intra-county inequality.
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 01453 | Leominster | Standard | 43,851 | $84,296 | 27.1 | 7.0% |
| 01420 | Fitchburg | Standard | 41,839 | $72,780 | 30.7 | 3.5% |
| 01604 | Worcester | Standard | 39,812 | $73,505 | 6.9 | 15.0% |
| 01545 | Shrewsbury | Standard | 38,876 | $139,302 | 21.4 | 8.5% |
| 01757 | Milford | Standard | 30,609 | $96,621 | 15.3 | 7.8% |
| 01605 | Worcester | Standard | 30,579 | $54,642 | 5.9 | 11.7% |
| 01610 | Worcester | Standard | 30,444 | $51,472 | 2.0 | 27.5% |
| 01602 | Worcester | Standard | 27,092 | $91,764 | 6.1 | 11.8% |
| 01606 | Worcester | Standard | 22,844 | $92,105 | 6.3 | 20.0% |
| 01609 | Worcester | Standard | 22,047 | $68,381 | 3.7 | 5.2% |
| 01581 | Westborough | Standard | 21,944 | $141,944 | 21.7 | 18.7% |
| 01440 | Gardner | Standard | 21,276 | $67,440 | 26.1 | 4.8% |
| 01603 | Worcester | Standard | 20,868 | $66,049 | 4.6 | 2.4% |
| 01550 | Southbridge | Standard | 17,928 | $66,287 | 20.9 | 6.9% |
| 01570 | Webster | Standard | 17,748 | $72,895 | 14.5 | 5.6% |
| 01520 | Holden | Standard | 16,912 | $148,125 | 19.4 | 14.9% |
| 01501 | Auburn | Standard | 16,877 | $116,762 | 16.2 | 4.6% |
| 01532 | Northborough | Standard | 15,750 | $153,199 | 18.3 | 7.6% |
| 01510 | Clinton | Standard | 15,563 | $89,781 | 7.6 | 13.8% |
| 01569 | Uxbridge | Standard | 14,304 | $124,222 | 30.0 | 4.4% |
| 01527 | Millbury | Standard | 13,961 | $118,790 | 16.4 | 4.6% |
| 01331 | Athol | Standard | 13,922 | $72,181 | 55.5 | 5.0% |
| 01507 | Charlton | Standard | 13,435 | $117,587 | 43.7 | 2.4% |
| 01562 | Spencer | Standard | 12,008 | $80,533 | 34.0 | 2.2% |
| 01571 | Dudley | Standard | 11,929 | $84,604 | 22.0 | 2.5% |
| 01462 | Lunenburg | Standard | 11,919 | $112,992 | 27.9 | 10.4% |
| 01540 | Oxford | Standard | 10,979 | $110,579 | 19.9 | -2.1% |
| 01475 | Winchendon | Standard | 10,265 | $76,552 | 42.7 | -1.9% |
| 01588 | Whitinsville | Standard | 10,258 | $92,486 | 8.7 | 7.2% |
| 01772 | Southborough | Standard | 9,907 | $201,568 | 14.8 | 3.6% |
| 01590 | Sutton | Standard | 9,422 | $147,015 | 34.4 | 4.5% |
| 01516 | Douglas | Standard | 9,376 | $153,172 | 38.3 | 8.7% |
| 01543 | Rutland | Standard | 9,353 | $145,707 | 38.2 | 14.2% |
| 01504 | Blackstone | Standard | 9,255 | $94,191 | 11.4 | 2.2% |
| 01607 | Worcester | Standard | 8,706 | $78,727 | 3.1 | -3.2% |
| 01523 | Lancaster | Standard | 8,606 | $134,833 | 29.9 | 9.7% |
| 01473 | Westminster | Standard | 8,374 | $106,331 | 37.3 | 13.8% |
| 01564 | Sterling | Standard | 8,183 | $129,063 | 31.8 | 4.0% |
| 01519 | Grafton | Standard | 8,058 | $178,263 | 11.0 | 22.6% |
| 01568 | Upton | Standard | 8,011 | $160,417 | 21.4 | 7.5% |
| 01583 | West Boylston | Standard | 7,606 | $106,094 | 14.5 | -1.1% |
| 01566 | Sturbridge | Standard | 7,362 | $137,730 | 29.2 | 6.0% |
| 01536 | North Grafton | Standard | 6,860 | $115,938 | 9.0 | -3.9% |
| 01430 | Ashburnham | Standard | 6,481 | $118,683 | 39.1 | 5.7% |
| 01524 | Leicester | Standard | 6,327 | $102,099 | 16.8 | -10.9% |
| 01756 | Mendon | Standard | 6,325 | $132,256 | 18.4 | 7.3% |
| 01534 | Northbridge | Standard | 6,230 | $141,250 | 9.1 | -1.2% |
| 01747 | Hopedale | Standard | 6,027 | $115,722 | 5.4 | 1.6% |
| 01740 | Bolton | Standard | 5,737 | $205,449 | 19.4 | 14.3% |
| 01451 | Harvard | Standard | 5,487 | $214,792 | 22.0 | 13.3% |
| 01005 | Barre | Standard | 5,204 | $111,148 | 41.2 | 1.8% |
| 01612 | Paxton | Standard | 5,002 | $134,083 | 16.0 | 2.5% |
| 01560 | South Grafton | Standard | 4,984 | $107,031 | 3.7 | 9.2% |
| 01505 | Boylston | Standard | 4,948 | $140,962 | 18.7 | 12.5% |
| 01608 | Worcester | Standard | 4,932 | $45,687 | 0.4 | 47.2% |
| 01585 | West Brookfield | Standard | 4,810 | $87,857 | 27.5 | 2.2% |
| 01535 | North Brookfield | Standard | 4,760 | $79,285 | 22.0 | 1.0% |
| 01452 | Hubbardston | Standard | 4,371 | $123,500 | 44.8 | -1.8% |
| 01468 | Templeton | Standard | 4,183 | $113,427 | 22.0 | 13.6% |
| 01436 | Baldwinville | Standard | 3,720 | $77,721 | 10.8 | -5.4% |
| 01541 | Princeton | Standard | 3,529 | $158,750 | 35.9 | 2.8% |
| 01506 | Brookfield | Standard | 3,460 | $81,250 | 16.6 | 1.9% |
| 01503 | Berlin | Standard | 3,378 | $121,336 | 12.8 | 15.8% |
| 01529 | Millville | Standard | 3,160 | $127,188 | 4.9 | -1.5% |
| 01522 | Jefferson | Standard | 3,152 | $100,625 | 16.2 | 3.8% |
| 01083 | Warren | PO Box | 2,858 | $64,032 | 12.2 | -8.0% |
| 01542 | Rochdale | Standard | 2,615 | $96,111 | 4.4 | 49.7% |
| 01518 | Fiskdale | Standard | 2,598 | $136,111 | 9.9 | 7.4% |
| 01611 | Cherry Valley | Standard | 2,299 | $109,868 | 3.7 | -6.5% |
| 01537 | North Oxford | Standard | 2,278 | $102,956 | 6.9 | -4.8% |
| 01515 | East Brookfield | Standard | 2,166 | $81,042 | 10.5 | -4.3% |
| 01031 | Gilbertville | Standard | 1,676 | $60,517 | 6.6 | 20.7% |
| 01068 | Oakham | Standard | 1,639 | $102,000 | 20.0 | -8.5% |
| 01368 | Royalston | Standard | 1,455 | $102,500 | 46.6 | 18.3% |
| 01092 | West Warren | PO Box | 1,200 | $68,614 | 6.8 | 11.3% |
| 01366 | Petersham | Standard | 1,185 | $110,750 | 43.7 | -12.5% |
| 01531 | New Braintree | Standard | 973 | $99,500 | 21.1 | -12.3% |
| 01745 | Fayville | Standard | 586 | $185,994 | 0.7 | 89.6% |
| 01037 | Hardwick | PO Box | 572 | $74,722 | 26.0 | -20.7% |
| 01074 | South Barre | PO Box | 368 | $79,583 | 0.3 | 22.3% |
| 01438 | East Templeton | PO Box | 330 | — | 0.0 | -28.9% |
| 01094 | Wheelwright | PO Box | 52 | — | 0.0 | -83.2% |
| 01525 | Linwood | PO Box | 0 | — | 0.0 | -100.0% |
| 01561 | South Lancaster | PO Box | 0 | — | 0.0 | -100.0% |
| 01467 | Still River | PO Box | — | — | 0.0 | — |
| 01441 | Westminster | Unique | — | — | 0.0 | — |
| 01509 | Charlton Depot | PO Box | — | — | 0.0 | — |
| 01586 | West Millbury | PO Box | — | — | 0.0 | — |
| 01508 | Charlton City | PO Box | — | — | 0.0 | — |
| 01538 | North Uxbridge | PO Box | — | — | 0.0 | — |
| 01526 | Manchaug | PO Box | — | — | 0.0 | — |
| 01653 | Worcester | Unique | — | — | 0.0 | — |
| 01601 | Worcester | PO Box | — | — | 0.0 | — |
| 01614 | Worcester | PO Box | — | — | 0.0 | — |
| 01615 | Worcester | PO Box | — | — | 0.0 | — |
| 01613 | Worcester | PO Box | — | — | 0.0 | — |
| 01655 | Worcester | Standard | — | — | 0.1 | — |
| 01546 | Shrewsbury | Unique | — | — | 0.0 | — |