Last official estimated population of Worcester County was 800,184 (year 2014)[1]. This was 0.251% of total US population and 11.8% of total Massachusetts state population. Area of Worcester County is 1,579.2 mi² (=4090.1 km²), in this year population density was 506.70 p/mi². If population growth rate would be same as in period 2010-2014 (+0.05%/yr), Worcester County population in 2024 would be 804,279 [0].
Historical population of Worcester County for period 1790-2014 [1] , [2] , [3]:
Estimated population for 2014[1]. Population density is in p./sq.mi [4]. Changes are for period 2010-2015. Value is %/year. Boundary lines are approx. 2012 [5]. Click on flag to hide it.
Population • Density • Changes • Legends • Position
[1790-1800] +0.75 %/yr
[1800-1810] +0.59 %/yr
[1810-1820] +1.27 %/yr
[1820-1830] +1.37 %/yr
[1830-1840] +1.23 %/yr
[1840-1850] +3.21 %/yr
[1850-1860] +2.01 %/yr
[1860-1870] +1.9 %/yr
[1870-1880] +1.65 %/yr
[1880-1890] +2.15 %/yr
[1890-1900] +2.14 %/yr
[1900-1910] +1.42 %/yr
[1910-1920] +1.31 %/yr
[1920-1930] +0.77 %/yr
[1930-1940] +0.27 %/yr
[1940-1950] +0.8 %/yr
[1950-1960] +0.65 %/yr
[1960-1970] +0.9 %/yr
[1970-1980] +0.13 %/yr
[1980-1990] +0.94 %/yr
[1990-2000] +0.55 %/yr
[2000-2005] +0.82 %/yr
[2005-2010] +0.44 %/yr
[2010-2014] +0.05 %/yr
Looking for settlements in Worcester County? Visit this page: Settlements in Worcester County, MA
Population of Worcester County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 23158 | 22023 | 45,181 |
| 5 to 9 | 24895 | 23410 | 48,305 |
| 10 to 14 | 26864 | 25424 | 52,288 |
| 15 to 19 | 29257 | 28097 | 57,354 |
| 20 to 24 | 28967 | 27556 | 56,523 |
| 25 to 29 | 25723 | 25101 | 50,824 |
| 30 to 34 | 24639 | 24561 | 49,200 |
| 35 to 39 | 23739 | 24330 | 48,069 |
| 40 to 44 | 26610 | 27992 | 54,602 |
| 45 to 49 | 30326 | 30648 | 60,974 |
| 50 to 54 | 32746 | 33266 | 66,012 |
| 55 to 59 | 30169 | 30649 | 60,818 |
| 60 to 64 | 24001 | 24640 | 48,641 |
| 65 to 69 | 18275 | 19534 | 37,809 |
| 70 to 74 | 12187 | 14100 | 26,287 |
| 75 to 79 | 7969 | 10517 | 18,486 |
| 80 to 84 | 5690 | 8596 | 14,286 |
| 85+ | 5754 | 12062 | 17,816 |
Worcester County resident population estimates by Sex, Race, and Hispanic Origin[1b]. For full list of abbrevations see: population.us/about page.
| Race | Male | Female | Total |
| NH | 358215 | 369753 | 727,968 |
| WAC | 357459 | 369874 | 727,333 |
| WA | 349845 | 361901 | 711,746 |
| NHWAC | 320632 | 333019 | 653,651 |
| NHWA | 314531 | 326608 | 641,139 |
| H | 42754 | 42753 | 85,507 |
| HWAC | 36827 | 36855 | 73,682 |
| HWA | 35314 | 35293 | 70,607 |
| BAC | 26817 | 25480 | 52,297 |
| BA | 22452 | 20815 | 43,267 |
| AAC | 21174 | 21999 | 43,173 |
| NHAAC | 20679 | 21522 | 42,201 |
| NHBAC | 21158 | 19810 | 40,968 |
| AA | 18719 | 19431 | 38,150 |
| NHAA | 18421 | 19140 | 37,561 |
| NHBA | 17942 | 16362 | 34,304 |
| TOM | 8103 | 8515 | 16,618 |
| NHTOM | 6494 | 6855 | 13,349 |
| HBAC | 5659 | 5670 | 11,329 |
| HBA | 4510 | 4453 | 8,963 |
| IAC | 3704 | 3762 | 7,466 |
| NHIAC | 2349 | 2382 | 4,731 |
| HTOM | 1609 | 1660 | 3,269 |
| IA | 1606 | 1529 | 3,135 |
| HIAC | 1355 | 1380 | 2,735 |
| HIA | 872 | 882 | 1,754 |
| NHIA | 734 | 647 | 1,381 |
| NAC | 555 | 629 | 1,184 |
| HAAC | 495 | 477 | 972 |
| NHNAC | 327 | 392 | 719 |
| HAA | 298 | 291 | 589 |
| NA | 244 | 315 | 559 |
| HNAC | 228 | 237 | 465 |
| HNA | 151 | 174 | 325 |
| NHNA | 93 | 141 | 234 |
• Middlesex County population
30.2 mi, 
67°
• Norfolk County
40 mi, 
103°
• Providence County
35.7 mi, 
148°
• Hampden County
37.6 mi, 
251°
• Hillsborough County
42.9 mi, 
14°
• Hampshire County
37 mi, 
272°
• Tolland County
37.5 mi, 
213°
• Windham County
33.7 mi, 
184°
• Cheshire County
45.2 mi, 
339°
• Franklin County
38.2 mi, 
299°
[0] Calculated by population.us from last known population growth rate, not official data.
[1] County population - 2014, archived from the original, retrieved 02/23/2016
[1b] Annual County Resident Population Estimates by Age, Sex, Race, and Hispanic Origin, (used only data for 2014) archived from the original, retrieved 02/23/2016
[2] County population - 2000-2010, archived from the original, retrieved 02/23/2016
[3] Population of States and Counties of the United States: 1790 to 1992, PDF, 15 Mb, census.gov, retrieved 02/23/2016
[4] County area, latitude longitude data, retrieved 02/23/2016
[5] County boundaries, CSV files on boundaries.us, retrived 03/18/2016
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