Last official estimated population of Erath County was 37,878 (year 2014)[1]. This was 0.012% of total US population and 0.1% of total Texas state population. Area of Erath County is 1,089.8 mi² (=2822.6 km²), in this year population density was 34.76 p/mi². If population growth rate would be same as in period 2010-2014 (-0.01%/yr), Erath County population in 2026 would be 37,842 [0].
Historical population of Erath 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] -2.93 %/yr
[1870-1880] +20.68 %/yr
[1880-1890] +6.23 %/yr
[1890-1900] +3.33 %/yr
[1900-1910] +0.69 %/yr
[1910-1920] -1.22 %/yr
[1920-1930] -3.06 %/yr
[1930-1940] -0.02 %/yr
[1940-1950] -1.18 %/yr
[1950-1960] -1.26 %/yr
[1960-1970] +1.12 %/yr
[1970-1980] +2.2 %/yr
[1980-1990] +2.18 %/yr
[1990-2000] +1.65 %/yr
[2000-2005] +1.39 %/yr
[2005-2010] +1.41 %/yr
[2010-2014] -0.01 %/yr
Looking for settlements in Erath County? Visit this page: Settlements in Erath County, TX
Population of Erath County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 1196 | 1220 | 2,416 |
| 5 to 9 | 1179 | 1132 | 2,311 |
| 10 to 14 | 1195 | 1118 | 2,313 |
| 15 to 19 | 1940 | 2234 | 4,174 |
| 20 to 24 | 2950 | 2952 | 5,902 |
| 25 to 29 | 1406 | 1282 | 2,688 |
| 30 to 34 | 1083 | 1067 | 2,150 |
| 35 to 39 | 1000 | 987 | 1,987 |
| 40 to 44 | 960 | 1062 | 2,022 |
| 45 to 49 | 1038 | 1036 | 2,074 |
| 50 to 54 | 1207 | 1188 | 2,395 |
| 55 to 59 | 1101 | 1097 | 2,198 |
| 60 to 64 | 972 | 1031 | 2,003 |
| 65 to 69 | 878 | 933 | 1,811 |
| 70 to 74 | 648 | 681 | 1,329 |
| 75 to 79 | 410 | 529 | 939 |
| 80 to 84 | 309 | 432 | 741 |
| 85+ | 234 | 460 | 694 |
Erath 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 | 18798 | 19706 | 38,504 |
| WA | 18525 | 19461 | 37,986 |
| NH | 15535 | 16553 | 32,088 |
| NHWAC | 14876 | 16048 | 30,924 |
| NHWA | 14666 | 15843 | 30,509 |
| H | 4171 | 3888 | 8,059 |
| HWAC | 3922 | 3658 | 7,580 |
| HWA | 3859 | 3618 | 7,477 |
| BAC | 526 | 384 | 910 |
| IAC | 433 | 401 | 834 |
| NHBAC | 454 | 342 | 796 |
| BA | 406 | 275 | 681 |
| NHBA | 360 | 250 | 610 |
| TOM | 304 | 273 | 577 |
| IA | 275 | 272 | 547 |
| NHTOM | 236 | 226 | 462 |
| NHIAC | 221 | 208 | 429 |
| AAC | 234 | 193 | 427 |
| HIAC | 212 | 193 | 405 |
| NHAAC | 203 | 164 | 367 |
| HIA | 173 | 166 | 339 |
| AA | 185 | 145 | 330 |
| NHAA | 161 | 122 | 283 |
| NHIA | 102 | 106 | 208 |
| HTOM | 68 | 47 | 115 |
| HBAC | 72 | 42 | 114 |
| HBA | 46 | 25 | 71 |
| HAAC | 31 | 29 | 60 |
| NAC | 24 | 32 | 56 |
| HAA | 24 | 23 | 47 |
| NHNAC | 22 | 19 | 41 |
| NA | 11 | 15 | 26 |
| NHNA | 10 | 6 | 16 |
| HNAC | 2 | 13 | 15 |
| HNA | 1 | 9 | 10 |
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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
*Milam Texas Notes
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