Last official estimated population of Jefferson County was 7,534 (year 2014)[1]. This was 0.002% of total US population and 0.4% of total Nebraska state population. Area of Jefferson County is 575.7 mi² (=1491 km²), in this year population density was 13.09 p/mi². If population growth rate would be same as in period 2010-2014 (-0.04%/yr), Jefferson County population in 2024 would be 7,502 [0].
Historical population of Jefferson County for period 1870-2014 [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
[1870-1880] +12.74 %/yr
[1880-1890] +6.25 %/yr
[1890-1900] +0.23 %/yr
[1900-1910] +1.04 %/yr
[1910-1920] -0.43 %/yr
[1920-1930] +0.17 %/yr
[1930-1940] -0.55 %/yr
[1940-1950] -1.3 %/yr
[1950-1960] -1.58 %/yr
[1960-1970] -1.07 %/yr
[1970-1980] -0.61 %/yr
[1980-1990] -1.13 %/yr
[1990-2000] -0.49 %/yr
[2000-2005] -0.77 %/yr
[2005-2010] -1.22 %/yr
[2010-2014] -0.04 %/yr
Looking for settlements in Jefferson County? Visit this page: Settlements in Jefferson County, NE
Population of Jefferson County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 213 | 196 | 409 |
| 5 to 9 | 241 | 223 | 464 |
| 10 to 14 | 227 | 249 | 476 |
| 15 to 19 | 209 | 192 | 401 |
| 20 to 24 | 158 | 157 | 315 |
| 25 to 29 | 187 | 172 | 359 |
| 30 to 34 | 201 | 185 | 386 |
| 35 to 39 | 195 | 165 | 360 |
| 40 to 44 | 199 | 189 | 388 |
| 45 to 49 | 185 | 225 | 410 |
| 50 to 54 | 264 | 249 | 513 |
| 55 to 59 | 329 | 294 | 623 |
| 60 to 64 | 301 | 279 | 580 |
| 65 to 69 | 227 | 251 | 478 |
| 70 to 74 | 158 | 179 | 337 |
| 75 to 79 | 141 | 166 | 307 |
| 80 to 84 | 107 | 136 | 243 |
| 85+ | 104 | 182 | 286 |
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 |
| WAC | 3591 | 3635 | 7,226 |
| WA | 3540 | 3596 | 7,136 |
| NH | 3523 | 3568 | 7,091 |
| NHWAC | 3480 | 3529 | 7,009 |
| NHWA | 3432 | 3493 | 6,925 |
| H | 123 | 121 | 244 |
| HWAC | 111 | 106 | 217 |
| HWA | 108 | 103 | 211 |
| TOM | 55 | 42 | 97 |
| NHTOM | 52 | 39 | 91 |
| BAC | 44 | 40 | 84 |
| IAC | 38 | 45 | 83 |
| NHBAC | 39 | 33 | 72 |
| NHIAC | 34 | 35 | 69 |
| BA | 19 | 21 | 40 |
| AAC | 25 | 12 | 37 |
| IA | 17 | 20 | 37 |
| NHAAC | 19 | 11 | 30 |
| NHBA | 15 | 14 | 29 |
| NHIA | 15 | 13 | 28 |
| AA | 14 | 9 | 23 |
| NHAA | 8 | 8 | 16 |
| HIAC | 4 | 10 | 14 |
| HBAC | 5 | 7 | 12 |
| HBA | 4 | 7 | 11 |
| HIA | 2 | 7 | 9 |
| HAAC | 6 | 1 | 7 |
| HAA | 6 | 1 | 7 |
| NAC | 5 | 1 | 6 |
| NHNAC | 5 | 1 | 6 |
| HTOM | 3 | 3 | 6 |
| NA | 1 | 1 | 2 |
| NHNA | 1 | 1 | 2 |
| HNAC | 0 | 0 | 0 |
| HNA | 0 | 0 | 0 |
• Gage County population
24.9 mi, 
77°
• Seward County
48.1 mi, 
0°
• Saline County
23.6 mi, 1°
• Marshall County
42.7 mi, 
129°
• Fillmore County
34 mi, 
315°
• Washington County
27.7 mi, 
174°
• Thayer County
23.9 mi, 
269°
• Republic County
36 mi, 
228°
• Nuckolls County
47.7 mi, 270°
• Pawnee County
47.5 mi, 
93°
[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
*Jones, Nuckolls (old) Nebraska Notes
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