Last official estimated population of Union County was 25,746 (year 2014)[1]. This was 0.008% of total US population and 0.6% of total Oregon state population. Area of Union County is 2,038.5 mi² (=5279.8 km²), in this year population density was 12.63 p/mi². If population growth rate would be same as in period 2010-2014 (-0%/yr), Union County population in 2024 would be 25,741 [0].
Historical population of Union 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] +10.05 %/yr
[1880-1890] +6.12 %/yr
[1890-1900] +2.93 %/yr
[1900-1910] +0.08 %/yr
[1910-1920] +0.27 %/yr
[1920-1930] +0.5 %/yr
[1930-1940] -0.05 %/yr
[1940-1950] +0.32 %/yr
[1950-1960] +0.12 %/yr
[1960-1970] +0.64 %/yr
[1970-1980] +2.13 %/yr
[1980-1990] -0.14 %/yr
[1990-2000] +0.38 %/yr
[2000-2005] +0.12 %/yr
[2005-2010] +0.85 %/yr
[2010-2014] -0 %/yr
Looking for settlements in Union County? Visit this page: Settlements in Union County, OR
Population of Union County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 752 | 792 | 1,544 |
| 5 to 9 | 834 | 765 | 1,599 |
| 10 to 14 | 799 | 788 | 1,587 |
| 15 to 19 | 888 | 880 | 1,768 |
| 20 to 24 | 1139 | 1192 | 2,331 |
| 25 to 29 | 708 | 682 | 1,390 |
| 30 to 34 | 773 | 755 | 1,528 |
| 35 to 39 | 686 | 625 | 1,311 |
| 40 to 44 | 597 | 675 | 1,272 |
| 45 to 49 | 650 | 626 | 1,276 |
| 50 to 54 | 736 | 852 | 1,588 |
| 55 to 59 | 900 | 994 | 1,894 |
| 60 to 64 | 933 | 887 | 1,820 |
| 65 to 69 | 776 | 763 | 1,539 |
| 70 to 74 | 550 | 587 | 1,137 |
| 75 to 79 | 397 | 390 | 787 |
| 80 to 84 | 248 | 380 | 628 |
| 85+ | 246 | 446 | 692 |
Union 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 | 12020 | 12539 | 24,559 |
| NH | 12039 | 12495 | 24,534 |
| WA | 11735 | 12243 | 23,978 |
| NHWAC | 11513 | 12002 | 23,515 |
| NHWA | 11258 | 11746 | 23,004 |
| H | 573 | 584 | 1,157 |
| HWAC | 507 | 537 | 1,044 |
| HWA | 477 | 497 | 974 |
| IAC | 314 | 325 | 639 |
| TOM | 311 | 324 | 635 |
| NHTOM | 276 | 284 | 560 |
| NHIAC | 256 | 279 | 535 |
| AAC | 209 | 256 | 465 |
| NHAAC | 189 | 241 | 430 |
| NAC | 214 | 175 | 389 |
| NHNAC | 208 | 169 | 377 |
| NA | 188 | 140 | 328 |
| NHNA | 184 | 138 | 322 |
| BAC | 181 | 132 | 313 |
| IA | 159 | 153 | 312 |
| AA | 121 | 160 | 281 |
| NHBAC | 159 | 108 | 267 |
| NHAA | 111 | 150 | 261 |
| NHIA | 121 | 131 | 252 |
| BA | 98 | 59 | 157 |
| NHBA | 89 | 46 | 135 |
| HIAC | 58 | 46 | 104 |
| HTOM | 35 | 40 | 75 |
| HIA | 38 | 22 | 60 |
| HBAC | 22 | 24 | 46 |
| HAAC | 20 | 15 | 35 |
| HBA | 9 | 13 | 22 |
| HAA | 10 | 10 | 20 |
| HNAC | 6 | 6 | 12 |
| HNA | 4 | 2 | 6 |
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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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