Last official estimated population of Polk County was 75,577 (year 2014)[1]. This was 0.024% of total US population and 1.9% of total Oregon state population. Area of Polk County is 744.0 mi² (=1926.9 km²), in this year population density was 101.59 p/mi². If population growth rate would be same as in period 2010-2014 (+0.06%/yr), Polk County population in 2026 would be 76,101 [0].
Historical population of Polk County for period 1850-2014 [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
[1850-1860] +13.18 %/yr
[1860-1870] +2.63 %/yr
[1870-1880] +3.45 %/yr
[1880-1890] +1.76 %/yr
[1890-1900] +2.36 %/yr
[1900-1910] +3.1 %/yr
[1910-1920] +0.52 %/yr
[1920-1930] +1.74 %/yr
[1930-1940] +1.72 %/yr
[1940-1950] +2.79 %/yr
[1950-1960] +0.08 %/yr
[1960-1970] +2.91 %/yr
[1970-1980] +2.49 %/yr
[1980-1990] +0.92 %/yr
[1990-2000] +2.34 %/yr
[2000-2005] +1.9 %/yr
[2005-2010] +1.91 %/yr
[2010-2014] +0.06 %/yr
Looking for settlements in Polk County? Visit this page: Settlements in Polk County, OR
Population of Polk County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 2174 | 2330 | 4,504 |
| 5 to 9 | 2562 | 2523 | 5,085 |
| 10 to 14 | 2672 | 2532 | 5,204 |
| 15 to 19 | 3013 | 3215 | 6,228 |
| 20 to 24 | 3453 | 3750 | 7,203 |
| 25 to 29 | 2105 | 2036 | 4,141 |
| 30 to 34 | 2191 | 2318 | 4,509 |
| 35 to 39 | 2138 | 2226 | 4,364 |
| 40 to 44 | 2155 | 2249 | 4,404 |
| 45 to 49 | 2159 | 2201 | 4,360 |
| 50 to 54 | 2349 | 2451 | 4,800 |
| 55 to 59 | 2259 | 2627 | 4,886 |
| 60 to 64 | 2306 | 2632 | 4,938 |
| 65 to 69 | 2125 | 2254 | 4,379 |
| 70 to 74 | 1516 | 1654 | 3,170 |
| 75 to 79 | 1039 | 1213 | 2,252 |
| 80 to 84 | 742 | 973 | 1,715 |
| 85+ | 665 | 1109 | 1,774 |
Polk 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 | 35387 | 37943 | 73,330 |
| WA | 34178 | 36651 | 70,829 |
| NH | 32447 | 35344 | 67,791 |
| NHWAC | 30671 | 33435 | 64,106 |
| NHWA | 29651 | 32325 | 61,976 |
| H | 5176 | 4949 | 10,125 |
| HWAC | 4716 | 4508 | 9,224 |
| HWA | 4527 | 4326 | 8,853 |
| IAC | 1590 | 1685 | 3,275 |
| TOM | 1309 | 1369 | 2,678 |
| AAC | 1137 | 1348 | 2,485 |
| NHIAC | 1159 | 1269 | 2,428 |
| NHTOM | 1095 | 1174 | 2,269 |
| NHAAC | 1014 | 1251 | 2,265 |
| IA | 962 | 1014 | 1,976 |
| AA | 680 | 880 | 1,560 |
| NHAA | 619 | 828 | 1,447 |
| NHIA | 677 | 730 | 1,407 |
| BAC | 646 | 530 | 1,176 |
| NHBAC | 542 | 422 | 964 |
| HIAC | 431 | 416 | 847 |
| BA | 361 | 249 | 610 |
| HIA | 285 | 284 | 569 |
| NAC | 287 | 277 | 564 |
| NHBA | 303 | 193 | 496 |
| NHNAC | 232 | 234 | 466 |
| HTOM | 214 | 195 | 409 |
| NA | 133 | 130 | 263 |
| HAAC | 123 | 97 | 220 |
| HBAC | 104 | 108 | 212 |
| NHNA | 102 | 94 | 196 |
| HBA | 58 | 56 | 114 |
| HAA | 61 | 52 | 113 |
| HNAC | 55 | 43 | 98 |
| HNA | 31 | 36 | 67 |
• Multnomah County population
65.4 mi, 
46°
• Washington County
47.4 mi, 
17°
• Clackamas County
61.5 mi, 
72°
• Lane County
71.6 mi, 
159°
• Marion County
40.2 mi, 
89°
• Linn County
51 mi, 
123°
• Yamhill County
24.3 mi, 
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• Benton County
28.1 mi, 
182°
• Lincoln County
30.9 mi, 
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• Tillamook County
42.2 mi, 
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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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