Last official estimated population of Wahkiakum County was 3,970 (year 2014)[1]. This was 0.001% of total US population and 0.1% of total Washington state population. Area of Wahkiakum County is 287.2 mi² (=743.8 km²), in this year population density was 13.82 p/mi². If population growth rate would be same as in period 2010-2014 (-0.05%/yr), Wahkiakum County population in 2024 would be 3,950 [0].
Historical population of Wahkiakum 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] +20.45 %/yr
[1870-1880] +19.46 %/yr
[1880-1890] +4.69 %/yr
[1890-1900] +1.1 %/yr
[1900-1910] +1.54 %/yr
[1910-1920] +0.56 %/yr
[1920-1930] +1.07 %/yr
[1930-1940] +1.05 %/yr
[1940-1950] -1.11 %/yr
[1950-1960] -1.12 %/yr
[1960-1970] +0.47 %/yr
[1970-1980] +0.65 %/yr
[1980-1990] -1.4 %/yr
[1990-2000] +1.4 %/yr
[2000-2005] 0 %/yr
[2005-2010] +0.79 %/yr
[2010-2014] -0.05 %/yr
Looking for settlements in Wahkiakum County? Visit this page: Settlements in Wahkiakum County, WA
Population of Wahkiakum County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 77 | 69 | 146 |
| 5 to 9 | 93 | 93 | 186 |
| 10 to 14 | 115 | 114 | 229 |
| 15 to 19 | 104 | 109 | 213 |
| 20 to 24 | 91 | 76 | 167 |
| 25 to 29 | 74 | 77 | 151 |
| 30 to 34 | 67 | 73 | 140 |
| 35 to 39 | 88 | 74 | 162 |
| 40 to 44 | 88 | 101 | 189 |
| 45 to 49 | 110 | 124 | 234 |
| 50 to 54 | 143 | 142 | 285 |
| 55 to 59 | 150 | 161 | 311 |
| 60 to 64 | 214 | 191 | 405 |
| 65 to 69 | 206 | 237 | 443 |
| 70 to 74 | 192 | 176 | 368 |
| 75 to 79 | 102 | 101 | 203 |
| 80 to 84 | 57 | 62 | 119 |
| 85+ | 44 | 72 | 116 |
Wahkiakum 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 |
| NH | 1963 | 1964 | 3,927 |
| WAC | 1954 | 1970 | 3,924 |
| WA | 1905 | 1902 | 3,807 |
| NHWAC | 1907 | 1892 | 3,799 |
| NHWA | 1862 | 1829 | 3,691 |
| H | 52 | 88 | 140 |
| TOM | 53 | 78 | 131 |
| IAC | 62 | 66 | 128 |
| HWAC | 47 | 78 | 125 |
| NHTOM | 49 | 72 | 121 |
| HWA | 43 | 73 | 116 |
| NHIAC | 57 | 57 | 114 |
| AAC | 18 | 52 | 70 |
| NHAAC | 18 | 50 | 68 |
| IA | 35 | 26 | 61 |
| BAC | 24 | 33 | 57 |
| NHIA | 32 | 20 | 52 |
| NHBAC | 20 | 29 | 49 |
| AA | 7 | 34 | 41 |
| NHAA | 7 | 33 | 40 |
| NAC | 11 | 9 | 20 |
| NHNAC | 11 | 8 | 19 |
| BA | 9 | 8 | 17 |
| HIAC | 5 | 9 | 14 |
| NHBA | 7 | 6 | 13 |
| NA | 6 | 4 | 10 |
| NHNA | 6 | 4 | 10 |
| HTOM | 4 | 6 | 10 |
| HIA | 3 | 6 | 9 |
| HBAC | 4 | 4 | 8 |
| HBA | 2 | 2 | 4 |
| HAAC | 0 | 2 | 2 |
| HNAC | 0 | 1 | 1 |
| HAA | 0 | 1 | 1 |
| HNA | 0 | 0 | 0 |
• Washington County population
53.6 mi, 
162°
• Clark County
57.7 mi, 
128°
• Thurston County
52.5 mi, 
32°
• Cowlitz County
37.4 mi, 
101°
• Lewis County
53.6 mi, 
68°
• Grays Harbor County
59.7 mi, 
341°
• Columbia County
29.4 mi, 
145°
• Clatsop County
23 mi, 
215°
• Tillamook County
60.1 mi, 
195°
• Pacific County
24.9 mi, 
316°
[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
*Lewis Washington Notes
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