Last official estimated population of Jefferson County was 14,745 (year 2014)[1]. This was 0.005% of total US population and 0.1% of total Florida state population. Area of Jefferson County is 636.5 mi² (=1648.6 km²), in this year population density was 23.16 p/mi². If population growth rate would be same as in period 2010-2014 (-0.03%/yr), Jefferson County population in 2022 would be 14,713 [0].
Historical population of Jefferson 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] +5.6 %/yr
[1840-1850] +3.05 %/yr
[1850-1860] +2.5 %/yr
[1860-1870] +3.1 %/yr
[1870-1880] +1.83 %/yr
[1880-1890] -0.19 %/yr
[1890-1900] +0.27 %/yr
[1900-1910] +0.61 %/yr
[1910-1920] -1.7 %/yr
[1920-1930] -0.78 %/yr
[1930-1940] -1.08 %/yr
[1940-1950] -1.43 %/yr
[1950-1960] -0.87 %/yr
[1960-1970] -0.83 %/yr
[1970-1980] +2 %/yr
[1980-1990] +0.54 %/yr
[1990-2000] +1.32 %/yr
[2000-2005] +1.99 %/yr
[2005-2010] +0.76 %/yr
[2010-2014] -0.03 %/yr
Looking for settlements in Jefferson County? Visit this page: Settlements in Jefferson County, FL
Population of Jefferson County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 361 | 328 | 689 |
| 5 to 9 | 359 | 349 | 708 |
| 10 to 14 | 351 | 345 | 696 |
| 15 to 19 | 297 | 274 | 571 |
| 20 to 24 | 424 | 322 | 746 |
| 25 to 29 | 469 | 342 | 811 |
| 30 to 34 | 519 | 312 | 831 |
| 35 to 39 | 476 | 308 | 784 |
| 40 to 44 | 544 | 403 | 947 |
| 45 to 49 | 537 | 460 | 997 |
| 50 to 54 | 608 | 535 | 1,143 |
| 55 to 59 | 558 | 593 | 1,151 |
| 60 to 64 | 538 | 609 | 1,147 |
| 65 to 69 | 483 | 499 | 982 |
| 70 to 74 | 379 | 369 | 748 |
| 75 to 79 | 211 | 242 | 453 |
| 80 to 84 | 104 | 203 | 307 |
| 85+ | 129 | 210 | 339 |
Jefferson 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 | 6993 | 6476 | 13,469 |
| WAC | 4697 | 4228 | 8,925 |
| WA | 4591 | 4130 | 8,721 |
| NHWAC | 4401 | 4045 | 8,446 |
| NHWA | 4304 | 3953 | 8,257 |
| BAC | 2625 | 2458 | 5,083 |
| NHBAC | 2579 | 2420 | 4,999 |
| BA | 2577 | 2402 | 4,979 |
| NHBA | 2540 | 2369 | 4,909 |
| H | 354 | 227 | 581 |
| HWAC | 296 | 183 | 479 |
| HWA | 287 | 177 | 464 |
| TOM | 116 | 108 | 224 |
| NHTOM | 106 | 100 | 206 |
| IAC | 82 | 67 | 149 |
| NHIAC | 64 | 57 | 121 |
| AAC | 46 | 52 | 98 |
| NHAAC | 42 | 50 | 92 |
| HBAC | 46 | 38 | 84 |
| HBA | 37 | 33 | 70 |
| AA | 25 | 40 | 65 |
| NHAA | 22 | 38 | 60 |
| IA | 35 | 21 | 56 |
| NHIA | 18 | 15 | 33 |
| HIAC | 18 | 10 | 28 |
| HIA | 17 | 6 | 23 |
| NAC | 13 | 7 | 20 |
| NHNAC | 13 | 5 | 18 |
| HTOM | 10 | 8 | 18 |
| HAAC | 4 | 2 | 6 |
| NA | 3 | 2 | 5 |
| HAA | 3 | 2 | 5 |
| NHNA | 3 | 1 | 4 |
| HNAC | 0 | 2 | 2 |
| HNA | 0 | 1 | 1 |
• Leon County population
23.2 mi, 
275°
• Lowndes County
46.5 mi, 
52°
• Gadsden County
44.3 mi, 283°
• Thomas County
30.5 mi, 
356°
• Wakulla County
34.9 mi, 
235°
• Decatur County
51.9 mi, 
307°
• Grady County
37.6 mi, 
325°
• Taylor County
33.2 mi, 
149°
• Madison County
25.1 mi, 
86°
• Brooks County
33.1 mi, 
33°
[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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