Last official estimated population of Owyhee County was 11,472 (year 2014)[1]. This was 0.004% of total US population and 0.7% of total Idaho state population. Area of Owyhee County is 7,697.0 mi² (=19935.1 km²), in this year population density was 1.49 p/mi². If population growth rate would be same as in period 2010-2014 (-0.12%/yr), Owyhee County population in 2026 would be 11,312 [0].
Historical population of Owyhee 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] -1.82 %/yr
[1880-1890] +3.55 %/yr
[1890-1900] +6.53 %/yr
[1900-1910] +0.61 %/yr
[1910-1920] +1.5 %/yr
[1920-1930] -1.34 %/yr
[1930-1940] +3.25 %/yr
[1940-1950] +1.1 %/yr
[1950-1960] +0.11 %/yr
[1960-1970] +0.07 %/yr
[1970-1980] +2.56 %/yr
[1980-1990] +0.14 %/yr
[1990-2000] +2.41 %/yr
[2000-2005] +0.65 %/yr
[2005-2010] +0.95 %/yr
[2010-2014] -0.12 %/yr
Looking for settlements in Owyhee County? Visit this page: Settlements in Owyhee County, ID
Population of Owyhee County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 341 | 380 | 721 |
| 5 to 9 | 455 | 418 | 873 |
| 10 to 14 | 462 | 450 | 912 |
| 15 to 19 | 445 | 394 | 839 |
| 20 to 24 | 355 | 332 | 687 |
| 25 to 29 | 302 | 243 | 545 |
| 30 to 34 | 315 | 318 | 633 |
| 35 to 39 | 345 | 342 | 687 |
| 40 to 44 | 337 | 332 | 669 |
| 45 to 49 | 333 | 318 | 651 |
| 50 to 54 | 401 | 382 | 783 |
| 55 to 59 | 417 | 369 | 786 |
| 60 to 64 | 371 | 343 | 714 |
| 65 to 69 | 318 | 313 | 631 |
| 70 to 74 | 227 | 257 | 484 |
| 75 to 79 | 168 | 172 | 340 |
| 80 to 84 | 119 | 92 | 211 |
| 85+ | 65 | 122 | 187 |
Owyhee 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 | 5427 | 5207 | 10,634 |
| WA | 5327 | 5087 | 10,414 |
| NH | 4181 | 4165 | 8,346 |
| NHWAC | 3985 | 3925 | 7,910 |
| NHWA | 3905 | 3838 | 7,743 |
| H | 1595 | 1412 | 3,007 |
| HWAC | 1442 | 1282 | 2,724 |
| HWA | 1422 | 1249 | 2,671 |
| IAC | 316 | 342 | 658 |
| IA | 252 | 261 | 513 |
| NHIAC | 205 | 236 | 441 |
| NHIA | 156 | 178 | 334 |
| TOM | 102 | 123 | 225 |
| HIAC | 111 | 106 | 217 |
| HIA | 96 | 83 | 179 |
| NHTOM | 81 | 90 | 171 |
| BAC | 65 | 70 | 135 |
| AAC | 62 | 71 | 133 |
| NHAAC | 41 | 60 | 101 |
| BA | 45 | 50 | 95 |
| AA | 41 | 44 | 85 |
| HBAC | 40 | 37 | 77 |
| HBA | 35 | 30 | 65 |
| NHAA | 24 | 36 | 60 |
| NHBAC | 25 | 33 | 58 |
| HTOM | 21 | 33 | 54 |
| HAAC | 21 | 11 | 32 |
| NHBA | 10 | 20 | 30 |
| NAC | 14 | 13 | 27 |
| HAA | 17 | 8 | 25 |
| NA | 9 | 12 | 21 |
| HNAC | 5 | 9 | 14 |
| NHNAC | 9 | 4 | 13 |
| HNA | 4 | 9 | 13 |
| NHNA | 5 | 3 | 8 |
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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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