Last official estimated population of Fairfield County was 919,506 (year 2014)[1]. This was 0.288% of total US population and 25.6% of total Connecticut state population. Area of Fairfield County is 836.9 mi² (=2167.6 km²), in this year population density was 1,098.67 p/mi². If population growth rate would be same as in period 2010-2014 (+0.07%/yr), Fairfield County population in 2024 would be 926,233 [0].
Historical population of Fairfield 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] +0.53 %/yr
[1800-1810] +0.7 %/yr
[1810-1820] +0.43 %/yr
[1820-1830] +0.96 %/yr
[1830-1840] +0.6 %/yr
[1840-1850] +1.82 %/yr
[1850-1860] +2.63 %/yr
[1860-1870] +2.09 %/yr
[1870-1880] +1.63 %/yr
[1880-1890] +2.97 %/yr
[1890-1900] +2.07 %/yr
[1900-1910] +2.91 %/yr
[1910-1920] +2.72 %/yr
[1920-1930] +1.88 %/yr
[1930-1940] +0.79 %/yr
[1940-1950] +1.89 %/yr
[1950-1960] +2.63 %/yr
[1960-1970] +1.95 %/yr
[1970-1980] +0.18 %/yr
[1980-1990] +0.25 %/yr
[1990-2000] +0.65 %/yr
[2000-2005] +0.34 %/yr
[2005-2010] +0.42 %/yr
[2010-2014] +0.07 %/yr
Looking for settlements in Fairfield County? Visit this page: Settlements in Fairfield County, CT
Population of Fairfield County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 27447 | 26219 | 53,666 |
| 5 to 9 | 31472 | 30226 | 61,698 |
| 10 to 14 | 34173 | 32255 | 66,428 |
| 15 to 19 | 34534 | 32927 | 67,461 |
| 20 to 24 | 29470 | 27777 | 57,247 |
| 25 to 29 | 27157 | 26261 | 53,418 |
| 30 to 34 | 28032 | 28740 | 56,772 |
| 35 to 39 | 28389 | 29521 | 57,910 |
| 40 to 44 | 31513 | 33246 | 64,759 |
| 45 to 49 | 35096 | 37685 | 72,781 |
| 50 to 54 | 36595 | 39359 | 75,954 |
| 55 to 59 | 33335 | 34973 | 68,308 |
| 60 to 64 | 25649 | 27595 | 53,244 |
| 65 to 69 | 19668 | 22615 | 42,283 |
| 70 to 74 | 14056 | 16812 | 30,868 |
| 75 to 79 | 9556 | 12696 | 22,252 |
| 80 to 84 | 7270 | 10669 | 17,939 |
| 85+ | 7548 | 14902 | 22,450 |
Fairfield 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 |
| WAC | 378709 | 391695 | 770,404 |
| NH | 371027 | 397515 | 768,542 |
| WA | 370680 | 383649 | 754,329 |
| NHWAC | 299070 | 315091 | 614,161 |
| NHWA | 293584 | 309401 | 602,985 |
| H | 89933 | 86963 | 176,896 |
| HWAC | 79639 | 76604 | 156,243 |
| HWA | 77096 | 74248 | 151,344 |
| BAC | 58514 | 67394 | 125,908 |
| BA | 53302 | 61769 | 115,071 |
| NHBAC | 49428 | 57667 | 107,095 |
| NHBA | 46367 | 54110 | 100,477 |
| AAC | 28043 | 30198 | 58,241 |
| NHAAC | 26932 | 29341 | 56,273 |
| AA | 24734 | 27093 | 51,827 |
| NHAA | 24074 | 26528 | 50,602 |
| HBAC | 9086 | 9727 | 18,813 |
| TOM | 9266 | 9403 | 18,669 |
| HBA | 6935 | 7659 | 14,594 |
| NHTOM | 6322 | 6736 | 13,058 |
| IAC | 4496 | 4408 | 8,904 |
| HTOM | 2944 | 2667 | 5,611 |
| HIAC | 2778 | 2393 | 5,171 |
| IA | 2437 | 2112 | 4,549 |
| NHIAC | 1718 | 2015 | 3,733 |
| HIA | 1908 | 1531 | 3,439 |
| NAC | 1261 | 1091 | 2,352 |
| HAAC | 1111 | 857 | 1,968 |
| HAA | 660 | 565 | 1,225 |
| HNAC | 695 | 505 | 1,200 |
| NHNAC | 566 | 586 | 1,152 |
| NHIA | 529 | 581 | 1,110 |
| NA | 541 | 452 | 993 |
| HNA | 390 | 293 | 683 |
| NHNA | 151 | 159 | 310 |
• Suffolk County population
40.2 mi, 
119°
• Bronx County
36.4 mi, 
224°
• Nassau County
36.3 mi, 
198°
• Westchester County
20.4 mi, 
255°
• Bergen County
41.2 mi, 
243°
• New Haven County
25.7 mi, 
70°
• Rockland County
34.6 mi, 261°
• Dutchess County
41.2 mi, 
332°
• Litchfield County
39.6 mi, 
9°
• Putnam County
24 mi, 
305°
[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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