Last official estimated population of Jefferson County was 6,454 (year 2014)[1]. This was 0.002% of total US population and 0.2% of total Oklahoma state population. Area of Jefferson County is 774.1 mi² (=2004.9 km²), in this year population density was 8.34 p/mi². If population growth rate would be same as in period 2010-2014 (-0.07%/yr), Jefferson County population in 2025 would be 6,405 [0].
Historical population of Jefferson County for period 1880-2014 [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
[1880-1890] NAN %/yr
[1890-1900] +INF %/yr
[1900-1910] +2.63 %/yr
[1910-1920] +0.13 %/yr
[1920-1930] -0.16 %/yr
[1930-1940] -1.4 %/yr
[1940-1950] -3.02 %/yr
[1950-1960] -3.01 %/yr
[1960-1970] -1.39 %/yr
[1970-1980] +1.39 %/yr
[1980-1990] -1.54 %/yr
[1990-2000] -0.27 %/yr
[2000-2005] -1.01 %/yr
[2005-2010] -0.03 %/yr
[2010-2014] -0.07 %/yr
Looking for settlements in Jefferson County? Visit this page: Settlements in Jefferson County, OK
Population of Jefferson County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 232 | 179 | 411 |
| 5 to 9 | 229 | 214 | 443 |
| 10 to 14 | 200 | 211 | 411 |
| 15 to 19 | 226 | 154 | 380 |
| 20 to 24 | 178 | 158 | 336 |
| 25 to 29 | 169 | 163 | 332 |
| 30 to 34 | 175 | 152 | 327 |
| 35 to 39 | 160 | 177 | 337 |
| 40 to 44 | 184 | 174 | 358 |
| 45 to 49 | 182 | 184 | 366 |
| 50 to 54 | 225 | 221 | 446 |
| 55 to 59 | 239 | 243 | 482 |
| 60 to 64 | 212 | 226 | 438 |
| 65 to 69 | 179 | 203 | 382 |
| 70 to 74 | 163 | 154 | 317 |
| 75 to 79 | 89 | 118 | 207 |
| 80 to 84 | 79 | 87 | 166 |
| 85+ | 58 | 95 | 153 |
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 | 2887 | 2853 | 5,740 |
| NH | 2858 | 2827 | 5,685 |
| WA | 2757 | 2708 | 5,465 |
| NHWAC | 2591 | 2600 | 5,191 |
| NHWA | 2467 | 2463 | 4,930 |
| IAC | 340 | 332 | 672 |
| NHIAC | 313 | 298 | 611 |
| H | 321 | 286 | 607 |
| HWAC | 296 | 253 | 549 |
| HWA | 290 | 245 | 535 |
| IA | 229 | 214 | 443 |
| NHIA | 207 | 186 | 393 |
| TOM | 138 | 150 | 288 |
| NHTOM | 132 | 142 | 274 |
| BAC | 74 | 59 | 133 |
| NHBAC | 72 | 53 | 125 |
| BA | 47 | 23 | 70 |
| NHBA | 45 | 18 | 63 |
| HIAC | 27 | 34 | 61 |
| HIA | 22 | 28 | 50 |
| AAC | 14 | 20 | 34 |
| NHAAC | 13 | 19 | 32 |
| AA | 7 | 17 | 24 |
| NHAA | 7 | 17 | 24 |
| HTOM | 6 | 8 | 14 |
| HBAC | 2 | 6 | 8 |
| HBA | 2 | 5 | 7 |
| NAC | 3 | 3 | 6 |
| NHNAC | 2 | 3 | 5 |
| HAAC | 1 | 1 | 2 |
| NA | 1 | 1 | 2 |
| HNAC | 1 | 0 | 1 |
| HNA | 1 | 0 | 1 |
| NHNA | 0 | 1 | 1 |
| HAA | 0 | 0 | 0 |
• Wichita County population
50.9 mi, 
261°
• Carter County
33.1 mi, 
72°
• Stephens County
26 mi, 
357°
• Cooke County
48.3 mi, 
131°
• Garvin County
51.4 mi, 
35°
• Montague County
30.2 mi, 
167°
• Murray County
51.1 mi, 
59°
• Clay County
30.8 mi, 
224°
• Love County
35.5 mi, 
106°
• Cotton County
33.1 mi, 
292°
[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
See note 7 Oklahoma Notes
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