Last official estimated population of DeWitt County was 20,049 (year 2014)[1]. This was 0.006% of total US population and 0.1% of total Texas state population. Area of DeWitt County is 910.5 mi² (=2358.2 km²), in this year population density was 22.02 p/mi². If population growth rate would be same as in period 2010-2014 (-0.06%/yr), DeWitt County population in 2026 would be 19,906 [0].
Historical population of DeWitt County for period 1850-2014 [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

[1850-1860] +11.53 %/yr
[1860-1870] +2.35 %/yr
[1870-1880] +4.58 %/yr
[1880-1890] +3.56 %/yr
[1890-1900] +4.07 %/yr
[1900-1910] +0.98 %/yr
[1910-1920] +1.76 %/yr
[1920-1930] -0.19 %/yr
[1930-1940] -0.95 %/yr
[1940-1950] -0.82 %/yr
[1950-1960] -1.04 %/yr
[1960-1970] -1.02 %/yr
[1970-1980] +0.13 %/yr
[1980-1990] -0.03 %/yr
[1990-2000] +0.6 %/yr
[2000-2005] +0.34 %/yr
[2005-2010] -0.24 %/yr
[2010-2014] -0.06 %/yr
Looking for settlements in DeWitt County? Visit this page: Settlements in DeWitt County, TX
Population of DeWitt County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 684 | 631 | 1,315 |
| 5 to 9 | 629 | 620 | 1,249 |
| 10 to 14 | 645 | 591 | 1,236 |
| 15 to 19 | 618 | 593 | 1,211 |
| 20 to 24 | 564 | 514 | 1,078 |
| 25 to 29 | 619 | 532 | 1,151 |
| 30 to 34 | 738 | 502 | 1,240 |
| 35 to 39 | 749 | 514 | 1,263 |
| 40 to 44 | 768 | 523 | 1,291 |
| 45 to 49 | 738 | 568 | 1,306 |
| 50 to 54 | 876 | 677 | 1,553 |
| 55 to 59 | 748 | 692 | 1,440 |
| 60 to 64 | 687 | 658 | 1,345 |
| 65 to 69 | 561 | 617 | 1,178 |
| 70 to 74 | 395 | 483 | 878 |
| 75 to 79 | 333 | 408 | 741 |
| 80 to 84 | 238 | 354 | 592 |
| 85+ | 193 | 424 | 617 |
DeWitt 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 | 9466 | 8942 | 18,408 |
| WA | 9337 | 8813 | 18,150 |
| NH | 6982 | 6693 | 13,675 |
| NHWAC | 5851 | 5886 | 11,737 |
| NHWA | 5780 | 5800 | 11,580 |
| H | 3801 | 3208 | 7,009 |
| HWAC | 3615 | 3056 | 6,671 |
| HWA | 3557 | 3013 | 6,570 |
| BAC | 1239 | 889 | 2,128 |
| BA | 1159 | 799 | 1,958 |
| NHBAC | 1112 | 768 | 1,880 |
| NHBA | 1061 | 707 | 1,768 |
| TOM | 135 | 138 | 273 |
| IAC | 147 | 112 | 259 |
| HBAC | 127 | 121 | 248 |
| HBA | 98 | 92 | 190 |
| IA | 104 | 77 | 181 |
| HIAC | 103 | 68 | 171 |
| NHTOM | 77 | 89 | 166 |
| AAC | 58 | 91 | 149 |
| NHAAC | 50 | 82 | 132 |
| HIA | 78 | 49 | 127 |
| AA | 41 | 74 | 115 |
| HTOM | 58 | 49 | 107 |
| NHAA | 37 | 69 | 106 |
| NHIAC | 44 | 44 | 88 |
| NHIA | 26 | 28 | 54 |
| NAC | 10 | 7 | 17 |
| HAAC | 8 | 9 | 17 |
| HNAC | 6 | 5 | 11 |
| HAA | 4 | 5 | 9 |
| NA | 7 | 0 | 7 |
| HNA | 6 | 0 | 6 |
| NHNAC | 4 | 2 | 6 |
| NHNA | 1 | 0 | 1 |
• Guadalupe County population
49.4 mi,
314°
• Victoria County
30.8 mi,
129°
• Wilson County
44.2 mi,
278°
• Caldwell County
54.2 mi,
342°
• Bee County
51.5 mi,
206°
• Gonzales County
27.4 mi,
343°
• Lavaca County
33.6 mi,
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• Karnes County
32 mi,
248°
• Jackson County
47.4 mi,
100°
• Goliad County
29.4 mi,
188°
[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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