Last official estimated population of Fairfield County was 146,391 (year 2014)[1]. This was 0.046% of total US population and 1.3% of total Ohio state population. Area of Fairfield County is 508.6 mi² (=1317.2 km²), in this year population density was 287.85 p/mi². If population growth rate would be same as in period 2010-2014 (+0.04%/yr), Fairfield County population in 2024 would be 146,980 [0].
Historical population of Fairfield County for period 1810-2014 [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
[1810-1820] +3.89 %/yr
[1820-1830] +4.07 %/yr
[1830-1840] +2.56 %/yr
[1840-1850] -0.53 %/yr
[1850-1860] +0.09 %/yr
[1860-1870] +0.19 %/yr
[1870-1880] +0.97 %/yr
[1880-1890] -0.1 %/yr
[1890-1900] +0.09 %/yr
[1900-1910] +1.36 %/yr
[1910-1920] +0.32 %/yr
[1920-1930] +0.84 %/yr
[1930-1940] +0.97 %/yr
[1940-1950] +0.73 %/yr
[1950-1960] +2.06 %/yr
[1960-1970] +1.38 %/yr
[1970-1980] +2.48 %/yr
[1980-1990] +1 %/yr
[1990-2000] +1.74 %/yr
[2000-2005] +2.45 %/yr
[2005-2010] +1.05 %/yr
[2010-2014] +0.04 %/yr
Looking for settlements in Fairfield County? Visit this page: Settlements in Fairfield County, OH
Population of Fairfield County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 4338 | 4125 | 8,463 |
| 5 to 9 | 5187 | 4936 | 10,123 |
| 10 to 14 | 5686 | 5479 | 11,165 |
| 15 to 19 | 5612 | 5108 | 10,720 |
| 20 to 24 | 5007 | 4137 | 9,144 |
| 25 to 29 | 4453 | 4049 | 8,502 |
| 30 to 34 | 4483 | 4566 | 9,049 |
| 35 to 39 | 4701 | 4849 | 9,550 |
| 40 to 44 | 5230 | 5243 | 10,473 |
| 45 to 49 | 5412 | 5412 | 10,824 |
| 50 to 54 | 5678 | 5779 | 11,457 |
| 55 to 59 | 5069 | 5284 | 10,353 |
| 60 to 64 | 4278 | 4587 | 8,865 |
| 65 to 69 | 3548 | 3919 | 7,467 |
| 70 to 74 | 2501 | 2912 | 5,413 |
| 75 to 79 | 1712 | 2114 | 3,826 |
| 80 to 84 | 1056 | 1426 | 2,482 |
| 85+ | 870 | 1635 | 2,505 |
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 |
| NH | 73273 | 73974 | 147,247 |
| WAC | 68022 | 69149 | 137,171 |
| NHWAC | 66663 | 67738 | 134,401 |
| WA | 66629 | 67731 | 134,360 |
| NHWA | 65363 | 66444 | 131,807 |
| BAC | 6450 | 5838 | 12,288 |
| NHBAC | 6282 | 5645 | 11,927 |
| BA | 5660 | 5004 | 10,664 |
| NHBA | 5541 | 4893 | 10,434 |
| H | 1548 | 1586 | 3,134 |
| TOM | 1474 | 1510 | 2,984 |
| HWAC | 1359 | 1411 | 2,770 |
| NHTOM | 1373 | 1376 | 2,749 |
| AAC | 1174 | 1462 | 2,636 |
| NHAAC | 1146 | 1423 | 2,569 |
| HWA | 1266 | 1287 | 2,553 |
| AA | 828 | 1110 | 1,938 |
| NHAA | 811 | 1096 | 1,907 |
| IAC | 671 | 666 | 1,337 |
| NHIAC | 592 | 575 | 1,167 |
| IA | 198 | 166 | 364 |
| HBAC | 168 | 193 | 361 |
| NHIA | 164 | 136 | 300 |
| HTOM | 101 | 134 | 235 |
| HBA | 119 | 111 | 230 |
| NAC | 80 | 90 | 170 |
| HIAC | 79 | 91 | 170 |
| NHNAC | 61 | 76 | 137 |
| NA | 32 | 39 | 71 |
| HAAC | 28 | 39 | 67 |
| HIA | 34 | 30 | 64 |
| NHNA | 21 | 29 | 50 |
| HNAC | 19 | 14 | 33 |
| HAA | 17 | 14 | 31 |
| HNA | 11 | 10 | 21 |
• Franklin County population
25.1 mi, 
306°
• Delaware County
41.6 mi, 
331°
• Licking County
24.8 mi, 
18°
• Muskingum County
39.1 mi, 
67°
• Ross County
37.5 mi, 
217°
• Pickaway County
23.7 mi, 
252°
• Perry County
20.7 mi, 
91°
• Hocking County
19.7 mi, 
157°
• Morgan County
41.7 mi, 
102°
• Vinton County
35.4 mi, 
167°
[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
*Washington, Ross Ohio Notes
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