Last official estimated population of Nassau County was 73,543 (year 2014)[1]. This was 0.023% of total US population and 0.4% of total Florida state population. Area of Nassau County is 725.9 mi² (=1880.1 km²), in this year population density was 101.31 p/mi². If population growth rate would be same as in period 2010-2014 (+0.08%/yr), Nassau County population in 2022 would be 74,003 [0].
Historical population of Nassau County for period 1830-2014 [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
[1830-1840] +2.27 %/yr
[1840-1850] +1.35 %/yr
[1850-1860] +5.35 %/yr
[1860-1870] +1.54 %/yr
[1870-1880] +4.56 %/yr
[1880-1890] +2.26 %/yr
[1890-1900] +1.53 %/yr
[1900-1910] +0.87 %/yr
[1910-1920] +0.75 %/yr
[1920-1930] -1.88 %/yr
[1930-1940] +1.45 %/yr
[1940-1950] +1.7 %/yr
[1950-1960] +2.98 %/yr
[1960-1970] +1.84 %/yr
[1970-1980] +4.78 %/yr
[1980-1990] +2.94 %/yr
[1990-2000] +2.75 %/yr
[2000-2005] +2.61 %/yr
[2005-2010] +2.26 %/yr
[2010-2014] +0.08 %/yr
Looking for settlements in Nassau County? Visit this page: Settlements in Nassau County, FL
Population of Nassau County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 1874 | 2002 | 3,876 |
| 5 to 9 | 2209 | 2033 | 4,242 |
| 10 to 14 | 2294 | 2232 | 4,526 |
| 15 to 19 | 2341 | 2172 | 4,513 |
| 20 to 24 | 2077 | 2034 | 4,111 |
| 25 to 29 | 2230 | 2039 | 4,269 |
| 30 to 34 | 2057 | 2061 | 4,118 |
| 35 to 39 | 1966 | 2121 | 4,087 |
| 40 to 44 | 2417 | 2414 | 4,831 |
| 45 to 49 | 2498 | 2655 | 5,153 |
| 50 to 54 | 2830 | 3051 | 5,881 |
| 55 to 59 | 2856 | 3090 | 5,946 |
| 60 to 64 | 2751 | 2997 | 5,748 |
| 65 to 69 | 2735 | 2907 | 5,642 |
| 70 to 74 | 1991 | 2081 | 4,072 |
| 75 to 79 | 1269 | 1297 | 2,566 |
| 80 to 84 | 743 | 872 | 1,615 |
| 85+ | 562 | 861 | 1,423 |
Nassau 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 | 36231 | 37486 | 73,717 |
| WAC | 34676 | 35661 | 70,337 |
| WA | 34154 | 35105 | 69,259 |
| NHWAC | 33395 | 34396 | 67,791 |
| NHWA | 32917 | 33892 | 66,809 |
| BAC | 2632 | 2811 | 5,443 |
| NHBAC | 2511 | 2696 | 5,207 |
| BA | 2404 | 2559 | 4,963 |
| NHBA | 2308 | 2473 | 4,781 |
| H | 1469 | 1433 | 2,902 |
| HWAC | 1281 | 1265 | 2,546 |
| HWA | 1237 | 1213 | 2,450 |
| TOM | 574 | 605 | 1,179 |
| AAC | 496 | 617 | 1,113 |
| NHTOM | 525 | 550 | 1,075 |
| NHAAC | 465 | 589 | 1,054 |
| AA | 337 | 449 | 786 |
| IAC | 409 | 368 | 777 |
| NHAA | 317 | 427 | 744 |
| NHIAC | 328 | 297 | 625 |
| IA | 199 | 167 | 366 |
| NHIA | 137 | 117 | 254 |
| HBAC | 121 | 115 | 236 |
| HBA | 96 | 86 | 182 |
| HIAC | 81 | 71 | 152 |
| NAC | 65 | 73 | 138 |
| NHNAC | 59 | 64 | 123 |
| HIA | 62 | 50 | 112 |
| HTOM | 49 | 55 | 104 |
| NA | 32 | 34 | 66 |
| HAAC | 31 | 28 | 59 |
| NHNA | 27 | 27 | 54 |
| HAA | 20 | 22 | 42 |
| HNAC | 6 | 9 | 15 |
| HNA | 5 | 7 | 12 |
• Duval County population
20 mi, 
159°
• Clay County
43.2 mi, 
187°
• Glynn County
44.8 mi, 
20°
• Camden County
22.5 mi, 18°
• Ware County
49.6 mi, 
308°
• Bradford County
51.1 mi, 
207°
• Baker County
37.4 mi, 
238°
• Brantley County
42.9 mi, 
342°
• Union County
52.4 mi, 
223°
• Charlton County
25.3 mi, 
298°
[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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