Last official estimated population of Jefferson County was 252,495 (year 2014)[1]. This was 0.079% of total US population and 0.9% of total Texas state population. Area of Jefferson County is 1,112.6 mi² (=2881.7 km²), in this year population density was 226.93 p/mi². If population growth rate would be same as in period 2010-2014 (+0.02%/yr), Jefferson County population in 2025 would be 253,107 [0].
Historical population of Jefferson 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] +0.83 %/yr
[1860-1870] -0.46 %/yr
[1870-1880] +6.23 %/yr
[1880-1890] +5.32 %/yr
[1890-1900] +9.29 %/yr
[1900-1910] +10.37 %/yr
[1910-1920] +6.71 %/yr
[1920-1930] +6.2 %/yr
[1930-1940] +0.86 %/yr
[1940-1950] +2.99 %/yr
[1950-1960] +2.33 %/yr
[1960-1970] -0.04 %/yr
[1970-1980] +0.25 %/yr
[1980-1990] -0.47 %/yr
[1990-2000] +0.51 %/yr
[2000-2005] -0.09 %/yr
[2005-2010] +0.11 %/yr
[2010-2014] +0.02 %/yr
Looking for settlements in Jefferson County? Visit this page: Settlements in Jefferson County, TX
Population of Jefferson County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 8702 | 8544 | 17,246 |
| 5 to 9 | 8547 | 8328 | 16,875 |
| 10 to 14 | 8077 | 7846 | 15,923 |
| 15 to 19 | 8283 | 8052 | 16,335 |
| 20 to 24 | 10306 | 8893 | 19,199 |
| 25 to 29 | 10307 | 8314 | 18,621 |
| 30 to 34 | 10138 | 8156 | 18,294 |
| 35 to 39 | 8851 | 7130 | 15,981 |
| 40 to 44 | 8222 | 7099 | 15,321 |
| 45 to 49 | 8252 | 7295 | 15,547 |
| 50 to 54 | 9102 | 8535 | 17,637 |
| 55 to 59 | 8645 | 8731 | 17,376 |
| 60 to 64 | 7006 | 7018 | 14,024 |
| 65 to 69 | 5104 | 5452 | 10,556 |
| 70 to 74 | 3413 | 4293 | 7,706 |
| 75 to 79 | 2514 | 3387 | 5,901 |
| 80 to 84 | 1922 | 2831 | 4,753 |
| 85+ | 1699 | 3241 | 4,940 |
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 |
| NH | 102264 | 102385 | 204,649 |
| WAC | 79418 | 73515 | 152,933 |
| WA | 77780 | 71877 | 149,657 |
| NHWAC | 55035 | 54622 | 109,657 |
| NHWA | 53813 | 53335 | 107,148 |
| BAC | 43792 | 44774 | 88,566 |
| BA | 42740 | 43670 | 86,410 |
| NHBAC | 42381 | 43675 | 86,056 |
| NHBA | 41544 | 42773 | 84,317 |
| H | 26826 | 20760 | 47,586 |
| HWAC | 24383 | 18893 | 43,276 |
| HWA | 23967 | 18542 | 42,509 |
| AAC | 5645 | 5011 | 10,656 |
| NHAAC | 5374 | 4760 | 10,134 |
| AA | 5176 | 4568 | 9,744 |
| NHAA | 4989 | 4405 | 9,394 |
| TOM | 1897 | 1898 | 3,795 |
| IAC | 2062 | 1699 | 3,761 |
| NHTOM | 1439 | 1488 | 2,927 |
| HBAC | 1411 | 1099 | 2,510 |
| IA | 1375 | 1029 | 2,404 |
| HBA | 1196 | 897 | 2,093 |
| HIAC | 1172 | 872 | 2,044 |
| NHIAC | 890 | 827 | 1,717 |
| HIA | 958 | 688 | 1,646 |
| HTOM | 458 | 410 | 868 |
| NHIA | 417 | 341 | 758 |
| HAAC | 271 | 251 | 522 |
| NAC | 274 | 233 | 507 |
| HAA | 187 | 163 | 350 |
| NHNAC | 176 | 133 | 309 |
| NA | 122 | 103 | 225 |
| HNAC | 98 | 100 | 198 |
| HNA | 60 | 60 | 120 |
| NHNA | 62 | 43 | 105 |
• Galveston County population
62.3 mi, 
226°
• Calcasieu Parish
54 mi, 
61°
• Orange County
24 mi, 
39°
• Liberty County
46.6 mi, 
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• Hardin County
36 mi, 
336°
• Jasper County
62.6 mi, 
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• Chambers County
33 mi, 
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• Tyler County
64.7 mi, 
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• Newton County
68.9 mi, 
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• Cameron Parish
59 mi, 
88°
[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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