Last official estimated population of Umatilla County was 76,045 (year 2014)[1]. This was 0.024% of total US population and 1.9% of total Oregon state population. Area of Umatilla County is 3,231.4 mi² (=8369.3 km²), in this year population density was 23.53 p/mi². If population growth rate would be same as in period 2010-2014 (+0.05%/yr), Umatilla County population in 2023 would be 76,397 [0].
Historical population of Umatilla 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] +12.66 %/yr
[1880-1890] +3.37 %/yr
[1890-1900] +3.04 %/yr
[1900-1910] +1.19 %/yr
[1910-1920] +2.48 %/yr
[1920-1930] -0.61 %/yr
[1930-1940] +0.65 %/yr
[1940-1950] +4.83 %/yr
[1950-1960] +0.62 %/yr
[1960-1970] +0.13 %/yr
[1970-1980] +2.74 %/yr
[1980-1990] +0.07 %/yr
[1990-2000] +1.76 %/yr
[2000-2005] +0.89 %/yr
[2005-2010] +0.57 %/yr
[2010-2014] +0.05 %/yr
Looking for settlements in Umatilla County? Visit this page: Settlements in Umatilla County, OR
Population of Umatilla County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 2846 | 2661 | 5,507 |
| 5 to 9 | 2874 | 2779 | 5,653 |
| 10 to 14 | 2732 | 2692 | 5,424 |
| 15 to 19 | 2657 | 2412 | 5,069 |
| 20 to 24 | 3019 | 2347 | 5,366 |
| 25 to 29 | 2943 | 2225 | 5,168 |
| 30 to 34 | 2747 | 2298 | 5,045 |
| 35 to 39 | 2638 | 2172 | 4,810 |
| 40 to 44 | 2612 | 2230 | 4,842 |
| 45 to 49 | 2491 | 2165 | 4,656 |
| 50 to 54 | 2589 | 2322 | 4,911 |
| 55 to 59 | 2518 | 2396 | 4,914 |
| 60 to 64 | 2297 | 2219 | 4,516 |
| 65 to 69 | 1819 | 1841 | 3,660 |
| 70 to 74 | 1262 | 1303 | 2,565 |
| 75 to 79 | 932 | 978 | 1,910 |
| 80 to 84 | 563 | 696 | 1,259 |
| 85+ | 564 | 866 | 1,430 |
Umatilla 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 | 37306 | 34168 | 71,474 |
| WA | 36400 | 33309 | 69,709 |
| NH | 29468 | 27492 | 56,960 |
| NHWAC | 27359 | 25636 | 52,995 |
| NHWA | 26658 | 24967 | 51,625 |
| H | 10635 | 9110 | 19,745 |
| HWAC | 9947 | 8532 | 18,479 |
| HWA | 9742 | 8342 | 18,084 |
| IAC | 2242 | 2208 | 4,450 |
| NHIAC | 1607 | 1684 | 3,291 |
| IA | 1653 | 1617 | 3,270 |
| NHIA | 1173 | 1244 | 2,417 |
| TOM | 959 | 915 | 1,874 |
| NHTOM | 742 | 716 | 1,458 |
| AAC | 620 | 665 | 1,285 |
| BAC | 813 | 408 | 1,221 |
| HIAC | 635 | 524 | 1,159 |
| NHAAC | 514 | 569 | 1,083 |
| NHBAC | 664 | 263 | 927 |
| AA | 401 | 466 | 867 |
| HIA | 480 | 373 | 853 |
| BA | 607 | 226 | 833 |
| NHAA | 331 | 397 | 728 |
| NHBA | 502 | 118 | 620 |
| HTOM | 217 | 199 | 416 |
| HBAC | 149 | 145 | 294 |
| NAC | 150 | 128 | 278 |
| NHNAC | 114 | 99 | 213 |
| HBA | 105 | 108 | 213 |
| HAAC | 106 | 96 | 202 |
| NA | 83 | 69 | 152 |
| HAA | 70 | 69 | 139 |
| NHNA | 62 | 50 | 112 |
| HNAC | 36 | 29 | 65 |
| HNA | 21 | 19 | 40 |
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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
*Wasco Oregon Notes
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