Last official estimated population of Tolland County was 153,199 (year 2014)[1]. This was 0.048% of total US population and 4.3% of total Connecticut state population. Area of Tolland County is 417.0 mi² (=1080.1 km²), in this year population density was 367.34 p/mi². If population growth rate would be same as in period 2010-2014 (+0.08%/yr), Tolland County population in 2026 would be 154,733 [0].
Historical population of Tolland 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] +0.89 %/yr
[1800-1810] -0.38 %/yr
[1810-1820] +0.39 %/yr
[1820-1830] +2.7 %/yr
[1830-1840] -0.39 %/yr
[1840-1850] +1.12 %/yr
[1850-1860] +0.53 %/yr
[1860-1870] +0.38 %/yr
[1870-1880] +0.92 %/yr
[1880-1890] +0.39 %/yr
[1890-1900] -0.22 %/yr
[1900-1910] +0.76 %/yr
[1910-1920] +0.28 %/yr
[1920-1930] +0.52 %/yr
[1930-1940] +1.07 %/yr
[1940-1950] +3.44 %/yr
[1950-1960] +4.39 %/yr
[1960-1970] +4.17 %/yr
[1970-1980] +1.05 %/yr
[1980-1990] +1.15 %/yr
[1990-2000] +0.58 %/yr
[2000-2005] +1.6 %/yr
[2005-2010] +0.67 %/yr
[2010-2014] +0.08 %/yr
Looking for settlements in Tolland County? Visit this page: Settlements in Tolland County, CT
Population of Tolland County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 3132 | 2931 | 6,063 |
| 5 to 9 | 3768 | 3644 | 7,412 |
| 10 to 14 | 4530 | 4247 | 8,777 |
| 15 to 19 | 7497 | 7501 | 14,998 |
| 20 to 24 | 9455 | 8962 | 18,417 |
| 25 to 29 | 4476 | 3548 | 8,024 |
| 30 to 34 | 4026 | 3714 | 7,740 |
| 35 to 39 | 3700 | 3611 | 7,311 |
| 40 to 44 | 4497 | 4356 | 8,853 |
| 45 to 49 | 5100 | 5281 | 10,381 |
| 50 to 54 | 5979 | 5875 | 11,854 |
| 55 to 59 | 5633 | 5771 | 11,404 |
| 60 to 64 | 4416 | 4483 | 8,899 |
| 65 to 69 | 3507 | 3723 | 7,230 |
| 70 to 74 | 2627 | 2720 | 5,347 |
| 75 to 79 | 1559 | 1872 | 3,431 |
| 80 to 84 | 1068 | 1374 | 2,442 |
| 85+ | 978 | 1806 | 2,784 |
Tolland 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 | 71910 | 71914 | 143,824 |
| WAC | 69344 | 69735 | 139,079 |
| WA | 68127 | 68490 | 136,617 |
| NHWAC | 65844 | 66663 | 132,507 |
| NHWA | 64806 | 65613 | 130,419 |
| H | 4038 | 3505 | 7,543 |
| AAC | 3675 | 3560 | 7,235 |
| NHAAC | 3516 | 3461 | 6,977 |
| BAC | 3655 | 2951 | 6,606 |
| HWAC | 3500 | 3072 | 6,572 |
| HWA | 3321 | 2877 | 6,198 |
| AA | 3125 | 3019 | 6,144 |
| NHAA | 3046 | 2972 | 6,018 |
| NHBAC | 3235 | 2535 | 5,770 |
| BA | 3073 | 2342 | 5,415 |
| NHBA | 2760 | 2056 | 4,816 |
| TOM | 1367 | 1369 | 2,736 |
| NHTOM | 1143 | 1150 | 2,293 |
| IAC | 528 | 554 | 1,082 |
| NHIAC | 425 | 411 | 836 |
| HBAC | 420 | 416 | 836 |
| HBA | 313 | 286 | 599 |
| HTOM | 224 | 219 | 443 |
| IA | 182 | 173 | 355 |
| NAC | 184 | 92 | 276 |
| HAAC | 159 | 99 | 258 |
| HIAC | 103 | 143 | 246 |
| NHIA | 134 | 107 | 241 |
| NHNAC | 85 | 70 | 155 |
| HAA | 79 | 47 | 126 |
| HNAC | 99 | 22 | 121 |
| HIA | 48 | 66 | 114 |
| NA | 74 | 26 | 100 |
| HNA | 53 | 10 | 63 |
| NHNA | 21 | 16 | 37 |
• Hartford County population
20.5 mi, 
259°
• New Haven County
45.5 mi, 
219°
• Worcester County
37.5 mi, 
33°
• Providence County
39.2 mi, 
88°
• Hampden County
24.5 mi, 
321°
• New London County
29.2 mi, 
155°
• Kent County
41.5 mi, 
108°
• Middlesex County
30.8 mi, 
197°
• Hampshire County
37.1 mi, 
333°
• Windham County
18.2 mi, 
97°
[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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