Last official estimated population of Island County was 78,692 (year 2014)[1]. This was 0.025% of total US population and 1.1% of total Washington state population. Area of Island County is 517.4 mi² (=1340 km²), in this year population density was 152.10 p/mi². If population growth rate would be same as in period 2010-2014 (+0.06%/yr), Island County population in 2025 would be 79,206 [0].
Historical population of Island 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] +7.85 %/yr
[1870-1880] +5.67 %/yr
[1880-1890] +5.1 %/yr
[1890-1900] +0.46 %/yr
[1900-1910] +9.66 %/yr
[1910-1920] +1.56 %/yr
[1920-1930] -0.22 %/yr
[1930-1940] +1.28 %/yr
[1940-1950] +6.15 %/yr
[1950-1960] +5.89 %/yr
[1960-1970] +3.24 %/yr
[1970-1980] +5.01 %/yr
[1980-1990] +3.17 %/yr
[1990-2000] +1.75 %/yr
[2000-2005] +1.63 %/yr
[2005-2010] +0.24 %/yr
[2010-2014] +0.06 %/yr
Looking for settlements in Island County? Visit this page: Settlements in Island County, WA
Population of Island County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 2328 | 2053 | 4,381 |
| 5 to 9 | 2077 | 1988 | 4,065 |
| 10 to 14 | 2047 | 1940 | 3,987 |
| 15 to 19 | 2117 | 1938 | 4,055 |
| 20 to 24 | 3293 | 2489 | 5,782 |
| 25 to 29 | 2957 | 2481 | 5,438 |
| 30 to 34 | 2451 | 2125 | 4,576 |
| 35 to 39 | 1962 | 1919 | 3,881 |
| 40 to 44 | 1910 | 1956 | 3,866 |
| 45 to 49 | 1993 | 2167 | 4,160 |
| 50 to 54 | 2495 | 2694 | 5,189 |
| 55 to 59 | 2596 | 3141 | 5,737 |
| 60 to 64 | 2936 | 3409 | 6,345 |
| 65 to 69 | 2971 | 3241 | 6,212 |
| 70 to 74 | 2219 | 2467 | 4,686 |
| 75 to 79 | 1508 | 1448 | 2,956 |
| 80 to 84 | 917 | 1044 | 1,961 |
| 85+ | 756 | 1242 | 1,998 |
Island 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 | 36646 | 37008 | 73,654 |
| WAC | 35880 | 35660 | 71,540 |
| WA | 34297 | 34101 | 68,398 |
| NHWAC | 33378 | 33229 | 66,607 |
| NHWA | 32008 | 31870 | 63,878 |
| H | 2887 | 2734 | 5,621 |
| AAC | 2327 | 3104 | 5,431 |
| NHAAC | 2193 | 2973 | 5,166 |
| HWAC | 2502 | 2431 | 4,933 |
| HWA | 2289 | 2231 | 4,520 |
| AA | 1497 | 2334 | 3,831 |
| NHAA | 1440 | 2268 | 3,708 |
| TOM | 1779 | 1750 | 3,529 |
| BAC | 1855 | 1406 | 3,261 |
| NHTOM | 1529 | 1521 | 3,050 |
| NHBAC | 1632 | 1269 | 2,901 |
| BA | 1352 | 931 | 2,283 |
| NHBA | 1210 | 861 | 2,071 |
| IAC | 993 | 1048 | 2,041 |
| NHIAC | 747 | 817 | 1,564 |
| IA | 409 | 424 | 833 |
| NAC | 394 | 395 | 789 |
| NHNAC | 342 | 346 | 688 |
| NHIA | 286 | 302 | 588 |
| HTOM | 250 | 229 | 479 |
| HIAC | 246 | 231 | 477 |
| NA | 199 | 202 | 401 |
| HBAC | 223 | 137 | 360 |
| NHNA | 173 | 186 | 359 |
| HAAC | 134 | 131 | 265 |
| HIA | 123 | 122 | 245 |
| HBA | 142 | 70 | 212 |
| HAA | 57 | 66 | 123 |
| HNAC | 52 | 49 | 101 |
| HNA | 26 | 16 | 42 |
• King County population
60.3 mi, 
139°
• Pierce County
80.2 mi, 
162°
• Snohomish County
42.3 mi, 
99°
• Kitsap County
35.9 mi, 
178°
• Whatcom County
60.8 mi, 
38°
• Skagit County
45.6 mi, 
59°
• Clallam County
56.3 mi, 
266°
• Mason County
60.3 mi, 
202°
• Jefferson County
46.5 mi, 
238°
• San Juan County
31.2 mi, 
320°
[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; Clark Washington Notes
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