Last official estimated population of Jack County was 9,018 (year 2014)[1]. This was 0.003% of total US population and 0% of total Texas state population. Area of Jack County is 920.1 mi² (=2383.1 km²), in this year population density was 9.80 p/mi². If population growth rate would be same as in period 2010-2014 (-0.07%/yr), Jack County population in 2026 would be 8,940 [0].
Historical population of Jack County for period 1860-2014 [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

[1860-1870] -3.59 %/yr
[1870-1880] +25.31 %/yr
[1880-1890] +3.93 %/yr
[1890-1900] +0.49 %/yr
[1900-1910] +1.46 %/yr
[1910-1920] -1.79 %/yr
[1920-1930] -0.86 %/yr
[1930-1940] +1.21 %/yr
[1940-1950] -2.71 %/yr
[1950-1960] -0.44 %/yr
[1960-1970] -1 %/yr
[1970-1980] +0.99 %/yr
[1980-1990] -0.59 %/yr
[1990-2000] +2.29 %/yr
[2000-2005] +0.77 %/yr
[2005-2010] -0.11 %/yr
[2010-2014] -0.07 %/yr
Looking for settlements in Jack County? Visit this page: Settlements in Jack County, TX
Population of Jack County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 271 | 261 | 532 |
| 5 to 9 | 266 | 234 | 500 |
| 10 to 14 | 286 | 264 | 550 |
| 15 to 19 | 310 | 269 | 579 |
| 20 to 24 | 434 | 207 | 641 |
| 25 to 29 | 414 | 214 | 628 |
| 30 to 34 | 355 | 197 | 552 |
| 35 to 39 | 304 | 219 | 523 |
| 40 to 44 | 314 | 230 | 544 |
| 45 to 49 | 351 | 247 | 598 |
| 50 to 54 | 419 | 295 | 714 |
| 55 to 59 | 300 | 257 | 557 |
| 60 to 64 | 252 | 240 | 492 |
| 65 to 69 | 234 | 241 | 475 |
| 70 to 74 | 168 | 192 | 360 |
| 75 to 79 | 126 | 149 | 275 |
| 80 to 84 | 84 | 98 | 182 |
| 85+ | 63 | 90 | 153 |
Jack 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 | 4562 | 3759 | 8,321 |
| WA | 4525 | 3720 | 8,245 |
| NH | 4106 | 3309 | 7,415 |
| NHWAC | 3750 | 3212 | 6,962 |
| NHWA | 3720 | 3179 | 6,899 |
| H | 845 | 595 | 1,440 |
| HWAC | 812 | 547 | 1,359 |
| HWA | 805 | 541 | 1,346 |
| BAC | 330 | 84 | 414 |
| NHBAC | 320 | 65 | 385 |
| BA | 309 | 66 | 375 |
| NHBA | 304 | 50 | 354 |
| IAC | 65 | 63 | 128 |
| IA | 48 | 41 | 89 |
| TOM | 40 | 42 | 82 |
| NHIAC | 39 | 42 | 81 |
| NHTOM | 32 | 35 | 67 |
| AAC | 31 | 32 | 63 |
| AA | 26 | 28 | 54 |
| NHAAC | 28 | 23 | 51 |
| HIAC | 26 | 21 | 47 |
| NHIA | 24 | 23 | 47 |
| NHAA | 25 | 20 | 45 |
| HIA | 24 | 18 | 42 |
| HBAC | 10 | 19 | 29 |
| HBA | 5 | 16 | 21 |
| HTOM | 8 | 7 | 15 |
| NAC | 3 | 10 | 13 |
| HAAC | 3 | 9 | 12 |
| NA | 3 | 7 | 10 |
| HAA | 1 | 8 | 9 |
| HNAC | 2 | 6 | 8 |
| HNA | 2 | 5 | 7 |
| NHNAC | 1 | 4 | 5 |
| NHNA | 1 | 2 | 3 |
• Parker County population
37.9 mi,
146°
• Wise County
29.9 mi,
91°
• Hood County
58.8 mi,
160°
• Palo Pinto County
34.2 mi,
194°
• Montague County
40.2 mi,
39°
• Young County
29.7 mi,
260°
• Clay County
38.3 mi,
356°
• Stephens County
51.5 mi,
228°
• Archer County
39.9 mi,
311°
• Throckmorton County
59.9 mi,
265°
[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
*Cooke Texas Notes
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