Last official estimated population of Marion County was 331,527 (year 2014)[1]. This was 0.104% of total US population and 1.6% of total Florida state population. Area of Marion County is 1,662.7 mi² (=4306.3 km²), in this year population density was 199.40 p/mi². If population growth rate would be same as in period 2010-2014 (+0.02%/yr), Marion County population in 2026 would be 332,215 [0].
Historical population of Marion County for period 1850-2014 [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

[1850-1860] +9.94 %/yr
[1860-1870] +2.3 %/yr
[1870-1880] +1.9 %/yr
[1880-1890] +4.77 %/yr
[1890-1900] +1.61 %/yr
[1900-1910] +0.99 %/yr
[1910-1920] -1.16 %/yr
[1920-1930] +2.13 %/yr
[1930-1940] +0.55 %/yr
[1940-1950] +2.03 %/yr
[1950-1960] +3.06 %/yr
[1960-1970] +2.95 %/yr
[1970-1980] +5.9 %/yr
[1980-1990] +4.75 %/yr
[1990-2000] +2.88 %/yr
[2000-2005] +3.24 %/yr
[2005-2010] +1.76 %/yr
[2010-2014] +0.02 %/yr
Looking for settlements in Marion County? Visit this page: Settlements in Marion County, FL
Population of Marion County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 8633 | 8034 | 16,667 |
| 5 to 9 | 9116 | 8739 | 17,855 |
| 10 to 14 | 9233 | 8883 | 18,116 |
| 15 to 19 | 9096 | 8374 | 17,470 |
| 20 to 24 | 9172 | 8907 | 18,079 |
| 25 to 29 | 8674 | 8998 | 17,672 |
| 30 to 34 | 8076 | 8717 | 16,793 |
| 35 to 39 | 7642 | 8167 | 15,809 |
| 40 to 44 | 8486 | 9341 | 17,827 |
| 45 to 49 | 9392 | 10204 | 19,596 |
| 50 to 54 | 10452 | 11708 | 22,160 |
| 55 to 59 | 10427 | 12579 | 23,006 |
| 60 to 64 | 10360 | 13026 | 23,386 |
| 65 to 69 | 12593 | 15060 | 27,653 |
| 70 to 74 | 11956 | 13382 | 25,338 |
| 75 to 79 | 9054 | 9701 | 18,755 |
| 80 to 84 | 6094 | 6385 | 12,479 |
| 85+ | 4353 | 6153 | 10,506 |
Marion 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 | 142465 | 156201 | 298,666 |
| WAC | 137847 | 148340 | 286,187 |
| WA | 135301 | 145775 | 281,076 |
| NHWAC | 119275 | 130051 | 249,326 |
| NHWA | 117140 | 127894 | 245,034 |
| BAC | 22717 | 25209 | 47,926 |
| BA | 21180 | 23655 | 44,835 |
| NHBAC | 21185 | 23643 | 44,828 |
| NHBA | 19899 | 22346 | 42,245 |
| H | 20344 | 20157 | 40,501 |
| HWAC | 18572 | 18289 | 36,861 |
| HWA | 18161 | 17881 | 36,042 |
| AAC | 3107 | 3592 | 6,699 |
| NHAAC | 2943 | 3444 | 6,387 |
| TOM | 2876 | 2914 | 5,790 |
| AA | 2476 | 2969 | 5,445 |
| NHAA | 2382 | 2889 | 5,271 |
| NHTOM | 2433 | 2463 | 4,896 |
| IAC | 1843 | 1909 | 3,752 |
| HBAC | 1532 | 1566 | 3,098 |
| NHIAC | 1380 | 1372 | 2,752 |
| HBA | 1281 | 1309 | 2,590 |
| IA | 848 | 898 | 1,746 |
| NHIA | 531 | 510 | 1,041 |
| HIAC | 463 | 537 | 1,000 |
| HTOM | 443 | 451 | 894 |
| HIA | 317 | 388 | 705 |
| NAC | 292 | 328 | 620 |
| NHNAC | 221 | 253 | 474 |
| HAAC | 164 | 148 | 312 |
| NA | 128 | 147 | 275 |
| NHNA | 80 | 99 | 179 |
| HAA | 94 | 80 | 174 |
| HNAC | 71 | 75 | 146 |
| HNA | 48 | 48 | 96 |
• Volusia County population
54.1 mi,
100°
• Lake County
36.3 mi,
146°
• Alachua County
37.7 mi,
329°
• Hernando County
50.5 mi,
210°
• Citrus County
38.2 mi,
229°
• Flagler County
49.3 mi,
67°
• Sumter County
33.8 mi,
183°
• Putnam County
33.3 mi,
33°
• Levy County
45 mi,
277°
• Bradford County
52.3 mi,
351°
[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
*Mosquito (Orange), Alachua Florida Notes
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