Last official estimated population of Fairfax city was 22,604 (year 2014)[1]. This was 0.007% of total US population and 0.3% of total Virginia state population. Area of Fairfax city is 6.3 mi² (=16.3 km²), in this year population density was 3,602.23 p/mi². If population growth rate would be same as in period 2010-2014 (+0.04%/yr), Fairfax city population in 2026 would be 22,721 [0].
Historical population of Fairfax city for period 1970-2014 [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
[1970-1980] -1.24 %/yr
[1980-1990] +0.28 %/yr
[1990-2000] +0.79 %/yr
[2000-2005] -0.67 %/yr
[2005-2010] +1.58 %/yr
[2010-2014] +0.04 %/yr
Looking for settlements in Fairfax city? Visit this page: Settlements in Fairfax city, VA
Population of Fairfax city by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 1086 | 1108 | 2,194 |
| 5 to 9 | 683 | 638 | 1,321 |
| 10 to 14 | 687 | 680 | 1,367 |
| 15 to 19 | 644 | 694 | 1,338 |
| 20 to 24 | 817 | 757 | 1,574 |
| 25 to 29 | 979 | 806 | 1,785 |
| 30 to 34 | 906 | 778 | 1,684 |
| 35 to 39 | 742 | 771 | 1,513 |
| 40 to 44 | 818 | 757 | 1,575 |
| 45 to 49 | 771 | 798 | 1,569 |
| 50 to 54 | 866 | 908 | 1,774 |
| 55 to 59 | 856 | 824 | 1,680 |
| 60 to 64 | 612 | 716 | 1,328 |
| 65 to 69 | 556 | 639 | 1,195 |
| 70 to 74 | 381 | 475 | 856 |
| 75 to 79 | 256 | 372 | 628 |
| 80 to 84 | 190 | 279 | 469 |
| 85+ | 208 | 425 | 633 |
Fairfax city 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 | 10022 | 10389 | 20,411 |
| WAC | 9196 | 9489 | 18,685 |
| WA | 8844 | 9105 | 17,949 |
| NHWAC | 7321 | 7661 | 14,982 |
| NHWA | 7052 | 7333 | 14,385 |
| AAC | 2243 | 2332 | 4,575 |
| NHAAC | 2187 | 2278 | 4,465 |
| AA | 2058 | 2097 | 4,155 |
| NHAA | 2024 | 2060 | 4,084 |
| H | 2036 | 2036 | 4,072 |
| HWAC | 1875 | 1828 | 3,703 |
| HWA | 1792 | 1772 | 3,564 |
| BAC | 794 | 801 | 1,595 |
| NHBAC | 697 | 699 | 1,396 |
| BA | 662 | 654 | 1,316 |
| NHBA | 606 | 593 | 1,199 |
| TOM | 389 | 439 | 828 |
| NHTOM | 294 | 367 | 661 |
| IAC | 185 | 225 | 410 |
| HIAC | 94 | 116 | 210 |
| IA | 90 | 114 | 204 |
| NHIAC | 91 | 109 | 200 |
| HBAC | 97 | 102 | 199 |
| HTOM | 95 | 72 | 167 |
| HIA | 53 | 85 | 138 |
| HBA | 56 | 61 | 117 |
| HAAC | 56 | 54 | 110 |
| NAC | 41 | 33 | 74 |
| HAA | 34 | 37 | 71 |
| NHIA | 37 | 29 | 66 |
| NHNAC | 26 | 23 | 49 |
| NA | 15 | 16 | 31 |
| HNAC | 15 | 10 | 25 |
| NHNA | 9 | 7 | 16 |
| HNA | 6 | 9 | 15 |
• Fairfax County population
2.1 mi, 
139°
• Montgomery County
20.3 mi, 
14°
• District of Columbia
15.6 mi, 
76°
• Prince William County
14.3 mi, 
222°
• Loudoun County
24.1 mi, 
310°
• Arlington County
10.8 mi, 80°
• Alexandria city
11.8 mi, 
101°
• Manassas city
12.4 mi, 
233°
• Manassas Park city
9.9 mi, 234°
• Falls Church city
7 mi, 
71°
[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
See note C12 Virginia Notes
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