Last official estimated population of Manassas city was 38,276 (year 2014)[1]. This was 0.012% of total US population and 0.5% of total Virginia state population. Area of Manassas city is 9.9 mi² (=25.7 km²), in this year population density was 3,853.03 p/mi². If population growth rate would be same as in period 2010-2014 (+0.3%/yr), Manassas city population in 2026 would be 39,674 [0].
Historical population of Manassas city for period 1980-2014 [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

[1980-1990] +6.04 %/yr
[1990-2000] +2.26 %/yr
[2000-2005] +0.99 %/yr
[2005-2010] +0.74 %/yr
[2010-2014] +0.3 %/yr
Looking for settlements in Manassas city? Visit this page: Settlements in Manassas city, VA
Population of Manassas city by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 1857 | 1773 | 3,630 |
| 5 to 9 | 1685 | 1520 | 3,205 |
| 10 to 14 | 1410 | 1393 | 2,803 |
| 15 to 19 | 1454 | 1323 | 2,777 |
| 20 to 24 | 1551 | 1438 | 2,989 |
| 25 to 29 | 1720 | 1622 | 3,342 |
| 30 to 34 | 1843 | 1667 | 3,510 |
| 35 to 39 | 1669 | 1552 | 3,221 |
| 40 to 44 | 1483 | 1410 | 2,893 |
| 45 to 49 | 1343 | 1412 | 2,755 |
| 50 to 54 | 1421 | 1536 | 2,957 |
| 55 to 59 | 1275 | 1338 | 2,613 |
| 60 to 64 | 978 | 973 | 1,951 |
| 65 to 69 | 619 | 692 | 1,311 |
| 70 to 74 | 401 | 435 | 836 |
| 75 to 79 | 248 | 320 | 568 |
| 80 to 84 | 136 | 209 | 345 |
| 85+ | 93 | 282 | 375 |
Manassas 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 |
| WAC | 16392 | 15994 | 32,386 |
| WA | 15670 | 15335 | 31,005 |
| NH | 13704 | 14198 | 27,902 |
| NHWAC | 9583 | 9924 | 19,507 |
| NHWA | 9064 | 9427 | 18,491 |
| H | 7482 | 6697 | 14,179 |
| HWAC | 6809 | 6070 | 12,879 |
| HWA | 6606 | 5908 | 12,514 |
| BAC | 3650 | 3673 | 7,323 |
| NHBAC | 3171 | 3197 | 6,368 |
| BA | 3152 | 3199 | 6,351 |
| NHBA | 2808 | 2841 | 5,649 |
| AAC | 1432 | 1520 | 2,952 |
| NHAAC | 1340 | 1452 | 2,792 |
| AA | 1209 | 1306 | 2,515 |
| NHAA | 1164 | 1275 | 2,439 |
| TOM | 812 | 756 | 1,568 |
| NHTOM | 583 | 564 | 1,147 |
| HBAC | 479 | 476 | 955 |
| IAC | 488 | 435 | 923 |
| HBA | 344 | 358 | 702 |
| HIAC | 321 | 251 | 572 |
| IA | 294 | 252 | 546 |
| HIA | 241 | 185 | 426 |
| HTOM | 229 | 192 | 421 |
| NHIAC | 167 | 184 | 351 |
| NAC | 91 | 83 | 174 |
| HAAC | 92 | 68 | 160 |
| NHIA | 53 | 67 | 120 |
| NHNAC | 59 | 46 | 105 |
| NA | 49 | 47 | 96 |
| HAA | 45 | 31 | 76 |
| HNAC | 32 | 37 | 69 |
| NHNA | 32 | 24 | 56 |
| HNA | 17 | 23 | 40 |
• Fairfax County population
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24.5 mi,
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22.6 mi,
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[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 C22 Virginia Notes
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