Last official estimated population of McMullen County was 712 (year 2014)[1]. This was 0% of total US population and 0% of total Texas state population. Area of McMullen County is 1,156.8 mi² (=2996.1 km²), in this year population density was 0.62 p/mi². If population growth rate would be same as in period 2010-2014 (+0.18%/yr), McMullen County population in 2026 would be 727 [0].
Historical population of McMullen County for period 1870-2014 [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

[1870-1880] +11.79 %/yr
[1880-1890] +4 %/yr
[1890-1900] -0.14 %/yr
[1900-1910] +0.64 %/yr
[1910-1920] -1.35 %/yr
[1920-1930] +3.56 %/yr
[1930-1940] +0.17 %/yr
[1940-1950] -1.45 %/yr
[1950-1960] -0.61 %/yr
[1960-1970] -0.19 %/yr
[1970-1980] -3.22 %/yr
[1980-1990] +0.35 %/yr
[1990-2000] +0.36 %/yr
[2000-2005] -1.41 %/yr
[2005-2010] -2.17 %/yr
[2010-2014] +0.18 %/yr
Looking for settlements in McMullen County? Visit this page: Settlements in McMullen County, TX
Population of McMullen County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 13 | 20 | 33 |
| 5 to 9 | 27 | 18 | 45 |
| 10 to 14 | 17 | 31 | 48 |
| 15 to 19 | 30 | 26 | 56 |
| 20 to 24 | 25 | 15 | 40 |
| 25 to 29 | 29 | 17 | 46 |
| 30 to 34 | 19 | 21 | 40 |
| 35 to 39 | 14 | 17 | 31 |
| 40 to 44 | 27 | 20 | 47 |
| 45 to 49 | 29 | 35 | 64 |
| 50 to 54 | 27 | 27 | 54 |
| 55 to 59 | 32 | 30 | 62 |
| 60 to 64 | 29 | 26 | 55 |
| 65 to 69 | 21 | 22 | 43 |
| 70 to 74 | 22 | 17 | 39 |
| 75 to 79 | 25 | 26 | 51 |
| 80 to 84 | 17 | 22 | 39 |
| 85+ | 9 | 3 | 12 |
McMullen 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 | 402 | 383 | 785 |
| WA | 387 | 378 | 765 |
| NH | 241 | 260 | 501 |
| NHWAC | 233 | 251 | 484 |
| NHWA | 229 | 249 | 478 |
| H | 171 | 133 | 304 |
| HWAC | 169 | 132 | 301 |
| HWA | 158 | 129 | 287 |
| TOM | 16 | 5 | 21 |
| IAC | 12 | 6 | 18 |
| BAC | 12 | 6 | 18 |
| HTOM | 12 | 3 | 15 |
| NHBAC | 8 | 4 | 12 |
| HIAC | 9 | 2 | 11 |
| BA | 6 | 5 | 11 |
| NHBA | 6 | 4 | 10 |
| NHIAC | 3 | 4 | 7 |
| HBAC | 4 | 2 | 6 |
| NHTOM | 4 | 2 | 6 |
| AAC | 2 | 3 | 5 |
| IA | 2 | 2 | 4 |
| NHAAC | 1 | 3 | 4 |
| AA | 1 | 3 | 4 |
| NHAA | 1 | 3 | 4 |
| NHIA | 1 | 2 | 3 |
| HAAC | 1 | 0 | 1 |
| HIA | 1 | 0 | 1 |
| HBA | 0 | 1 | 1 |
| HNAC | 0 | 0 | 0 |
| HNA | 0 | 0 | 0 |
| NAC | 0 | 0 | 0 |
| NHNA | 0 | 0 | 0 |
| NHNAC | 0 | 0 | 0 |
| NA | 0 | 0 | 0 |
| HAA | 0 | 0 | 0 |
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[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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