Last official estimated population of Jefferson County was 77,311 (year 2014)[1]. This was 0.024% of total US population and 2.6% of total Arkansas state population. Area of Jefferson County is 913.8 mi² (=2366.7 km²), in this year population density was 84.61 p/mi². If population growth rate would be same as in period 2010-2014 (-0.04%/yr), Jefferson County population in 2026 would be 76,940 [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] +12.76 %/yr
[1840-1850] +8.56 %/yr
[1850-1860] +9.88 %/yr
[1860-1870] +0.5 %/yr
[1870-1880] +3.59 %/yr
[1880-1890] +6.21 %/yr
[1890-1900] +0.02 %/yr
[1900-1910] +2.56 %/yr
[1910-1920] +1.35 %/yr
[1920-1930] +0.62 %/yr
[1930-1940] +0.15 %/yr
[1940-1950] +1.57 %/yr
[1950-1960] +0.68 %/yr
[1960-1970] +0.48 %/yr
[1970-1980] +0.61 %/yr
[1980-1990] -0.59 %/yr
[1990-2000] -0.14 %/yr
[2000-2005] -0.9 %/yr
[2005-2010] -0.79 %/yr
[2010-2014] -0.04 %/yr
Looking for settlements in Jefferson County? Visit this page: Settlements in Jefferson County, AR
Population of Jefferson County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 2288 | 2208 | 4,496 |
| 5 to 9 | 2383 | 2235 | 4,618 |
| 10 to 14 | 2570 | 2229 | 4,799 |
| 15 to 19 | 2550 | 2472 | 5,022 |
| 20 to 24 | 2698 | 2642 | 5,340 |
| 25 to 29 | 2418 | 2315 | 4,733 |
| 30 to 34 | 2331 | 2224 | 4,555 |
| 35 to 39 | 2073 | 1979 | 4,052 |
| 40 to 44 | 2113 | 2111 | 4,224 |
| 45 to 49 | 2160 | 2306 | 4,466 |
| 50 to 54 | 2514 | 2605 | 5,119 |
| 55 to 59 | 2491 | 2749 | 5,240 |
| 60 to 64 | 2194 | 2529 | 4,723 |
| 65 to 69 | 1813 | 1905 | 3,718 |
| 70 to 74 | 1211 | 1394 | 2,605 |
| 75 to 79 | 823 | 1062 | 1,885 |
| 80 to 84 | 505 | 807 | 1,312 |
| 85+ | 399 | 991 | 1,390 |
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 | 34776 | 36112 | 70,888 |
| BAC | 19479 | 21231 | 40,710 |
| NHBAC | 19343 | 21102 | 40,445 |
| BA | 19185 | 20965 | 40,150 |
| NHBA | 19063 | 20845 | 39,908 |
| WAC | 15763 | 15226 | 30,989 |
| WA | 15337 | 14801 | 30,138 |
| NHWAC | 15176 | 14746 | 29,922 |
| NHWA | 14784 | 14346 | 29,130 |
| H | 758 | 651 | 1,409 |
| HWAC | 587 | 480 | 1,067 |
| HWA | 553 | 455 | 1,008 |
| TOM | 497 | 479 | 976 |
| NHTOM | 455 | 452 | 907 |
| AAC | 390 | 395 | 785 |
| NHAAC | 362 | 375 | 737 |
| IAC | 360 | 359 | 719 |
| AA | 314 | 327 | 641 |
| NHIAC | 311 | 318 | 629 |
| NHAA | 301 | 312 | 613 |
| IA | 164 | 145 | 309 |
| HBAC | 136 | 129 | 265 |
| NHIA | 137 | 119 | 256 |
| HBA | 122 | 120 | 242 |
| NAC | 61 | 72 | 133 |
| NHNAC | 58 | 63 | 121 |
| HIAC | 49 | 41 | 90 |
| NA | 37 | 46 | 83 |
| NHNA | 36 | 38 | 74 |
| HTOM | 42 | 27 | 69 |
| HIA | 27 | 26 | 53 |
| HAAC | 28 | 20 | 48 |
| HAA | 13 | 15 | 28 |
| HNAC | 3 | 9 | 12 |
| HNA | 1 | 8 | 9 |
• Pulaski County population
40.4 mi, 
327°
• Saline County
49.5 mi, 
301°
• Lonoke County
33.1 mi, 
3°
• Arkansas County
31.6 mi, 
88°
• Drew County
49.2 mi, 
165°
• Grant County
28.1 mi, 
271°
• Lincoln County
25 mi, 
152°
• Prairie County
43.8 mi, 
29°
• Cleveland County
30.4 mi, 
209°
• Dallas County
46.6 mi, 
242°
[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
*Pulaski, Arkansas Arkansas Notes
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