Last official estimated population of Knox County was 3,729 (year 2014)[1]. This was 0.001% of total US population and 0% of total Texas state population. Area of Knox County is 855.5 mi² (=2215.7 km²), in this year population density was 4.36 p/mi². If population growth rate would be same as in period 2010-2014 (+0.07%/yr), Knox County population in 2026 would be 3,759 [0].
Historical population of Knox 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] +30.86 %/yr
[1890-1900] +7.43 %/yr
[1900-1910] +15.28 %/yr
[1910-1920] -0.41 %/yr
[1920-1930] +2.09 %/yr
[1930-1940] -1.19 %/yr
[1940-1950] -0.01 %/yr
[1950-1960] -2.46 %/yr
[1960-1970] -2.71 %/yr
[1970-1980] -1.13 %/yr
[1980-1990] -0.96 %/yr
[1990-2000] -1.28 %/yr
[2000-2005] -2.11 %/yr
[2005-2010] -0.54 %/yr
[2010-2014] +0.07 %/yr
Looking for settlements in Knox County? Visit this page: Settlements in Knox County, TX
Population of Knox County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 133 | 155 | 288 |
| 5 to 9 | 146 | 142 | 288 |
| 10 to 14 | 137 | 127 | 264 |
| 15 to 19 | 128 | 132 | 260 |
| 20 to 24 | 94 | 108 | 202 |
| 25 to 29 | 106 | 95 | 201 |
| 30 to 34 | 104 | 104 | 208 |
| 35 to 39 | 125 | 81 | 206 |
| 40 to 44 | 89 | 116 | 205 |
| 45 to 49 | 108 | 98 | 206 |
| 50 to 54 | 134 | 109 | 243 |
| 55 to 59 | 153 | 121 | 274 |
| 60 to 64 | 114 | 99 | 213 |
| 65 to 69 | 100 | 103 | 203 |
| 70 to 74 | 76 | 91 | 167 |
| 75 to 79 | 65 | 116 | 181 |
| 80 to 84 | 59 | 66 | 125 |
| 85+ | 45 | 79 | 124 |
Knox 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 | 1756 | 1799 | 3,555 |
| WA | 1717 | 1769 | 3,486 |
| NH | 1239 | 1323 | 2,562 |
| NHWAC | 1118 | 1209 | 2,327 |
| NHWA | 1094 | 1193 | 2,287 |
| H | 677 | 619 | 1,296 |
| HWAC | 638 | 590 | 1,228 |
| HWA | 623 | 576 | 1,199 |
| BAC | 147 | 127 | 274 |
| BA | 122 | 113 | 235 |
| NHBAC | 115 | 108 | 223 |
| NHBA | 99 | 101 | 200 |
| IAC | 44 | 34 | 78 |
| TOM | 44 | 32 | 76 |
| HBAC | 32 | 19 | 51 |
| IA | 28 | 21 | 49 |
| NHTOM | 26 | 17 | 43 |
| NHIAC | 25 | 14 | 39 |
| HIAC | 19 | 20 | 39 |
| HBA | 23 | 12 | 35 |
| HTOM | 18 | 15 | 33 |
| HIA | 12 | 14 | 26 |
| NHIA | 16 | 7 | 23 |
| AAC | 13 | 7 | 20 |
| NHAAC | 8 | 5 | 13 |
| NAC | 3 | 7 | 10 |
| NHAA | 4 | 4 | 8 |
| AA | 4 | 4 | 8 |
| HAAC | 5 | 2 | 7 |
| HNAC | 3 | 3 | 6 |
| NA | 1 | 3 | 4 |
| NHNAC | 0 | 4 | 4 |
| HNA | 1 | 2 | 3 |
| NHNA | 0 | 1 | 1 |
| HAA | 0 | 0 | 0 |
• Wilbarger County population
43.4 mi, 
41°
• Haskell County
30.5 mi, 
178°
• Hardeman County
46.5 mi, 
0°
• Baylor County
31 mi, 
89°
• Dickens County
59.9 mi, 
269°
• Throckmorton County
43.9 mi, 
134°
• Cottle County
44.7 mi, 
317°
• Stonewall County
42 mi, 
224°
• Foard County
24.3 mi, 
350°
• King County
28.7 mi, 269°
[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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