• county
  • FIPS 53029
  • Largest town: Oak Harbor

Island County, Washington

Island County had 86,478 residents in the Census Vintage 2024 estimate, on 208.5 square miles of land. It ranks 16th of 39 in Washington by population and 38th by land area.

Population
86,478
#16 of 39 in Washington · #684 in US
Area
208.5 sq mi
#38 of 39 in Washington · #2,987 in US
Density
415 / sq mi
#6 of 39 in Washington · #337 in US
Median household income
$88,451
#8 of 39 in Washington · #268 in US

Census Vintage 2024 estimates · SAIPE 2023 income · 2024 Gazetteer land area

Island County within Washington. Pin: Olympia.

Measure from here

Tools and pages that start from Island County

Island County population, land area and income

Island County had 86,478 residents in the Census Vintage 2024 estimate, on 208.5 square miles of land. It ranks 16th of 39 in Washington by population and 38th by land area. That works out to 414.8 people per square mile, 4.3 times the US average of 96.3, and in the top quarter nationally.

The median county-equivalent in Washington has 69,632 residents; Island County is somewhat larger.

Its SAIPE 2023 median household income of $88,451 is in the top tenth among 3,143 counties with an estimate.

National rank among 3,144

Population

86,478

3144th1st

684th of 3,144 (US)

Land area

208 sq mi

3144th1st

2987th of 3,144 (US)

Density

414.8 / sq mi

3144th1st

337th of 3,144 (US)

Median household income

$88,451

3143rd1st

268th of 3,143 (US)

Rank within Washington (39)

Population

86,478

39th1st

16th of 39 (WA)

Land area

208 sq mi

39th1st

38th of 39 (WA)

Density

414.8 / sq mi

39th1st

6th of 39 (WA)

Median household income

$88,451

39th1st

8th of 39 (WA)

How Island County's population changed since 2020

Island County lost 529 residents between the July 2020 and July 2024 estimates, a drop of 0.6%. That ranks 38th of 39 in Washington for growth. The median Washington county changed by +3.2%, and the state as a whole by +3.0%.

Since the April 2020 estimates base, Island County recorded 3,276 births and 3,820 deaths, a natural change of -544. Net international migration added +645 and net domestic migration, people moving to or from other US counties, came to -369. The largest single component was international migration, which added 645 people.

87.0k202087.6k202186.7k202286.4k202386.5k2024
Census Vintage 2024 county estimates for July 1 of each year. The axis starts above zero so year-to-year changes are visible.

Components of change, April 2020 to July 2024

Births
3,276
Deaths
3,820
Net international migration
+645
Net domestic migration
-369
Change, July 2023 to July 2024
+109

Where Island County is

The Census internal point of Island County is at 48.158600, -122.670600. It sits in UTM zone 10N. The map shades Washington's 39 county-equivalents by population change from 2020 to 2024, darker for faster growth, with Island County outlined. Dots are towns of 1,000+ people with residents in it.

King County: +2.9%Thurston County: +2.3%Garfield County: +4.7%Adams County: +2.1%Kitsap County: +2.0%Mason County: +5.5%Stevens County: +5.2%Walla Walla County: -0.9%Whitman County: +1.2%Pierce County: +1.9%Benton County: +5.2%Columbia County: +1.8%Skamania County: +5.1%Douglas County: +6.4%Kittitas County: +2.9%Klickitat County: +5.7%Pacific County: +3.2%Grant County: +5.3%Grays Harbor County: +2.7%Jefferson County: +2.7%Lincoln County: +8.6%San Juan County: +4.7%Skagit County: +2.2%Island County: -0.6%Ferry County: +4.8%Chelan County: +2.4%Clark County: +4.3%Asotin County: +0.9%Franklin County: +4.2%Whatcom County: +3.3%Snohomish County: +4.1%Pend Oreille County: +6.1%Yakima County: +0.7%Clallam County: +0.8%Wahkiakum County: +7.9%Spokane County: +2.7%Okanogan County: +6.6%Cowlitz County: +2.7%Lewis County: +5.4%
Change 2020 to 2024
  1. < +1.9%
  2. < +2.7%
  3. < +4.2%
  4. < +5.3%
  5. ≥ +5.3%
no data

Orange pin: Island County internal point. Dark pin: Olympia.

Internal point

Decimal
48.158600, -122.670600
DMS
48°09'30.96"N 122°40'14.16"W
UTM
10N 524496.3E 5333980.7N
Geohash
c28cbx1bp
Plus code
84WV585H+CQ

Towns in Island County

3 incorporated places of 1,000+ people have residents in Island County, 27,237 people together, or 31% of the county. Each figure counts only the part of the town inside Island County; towns marked "part" extend into another county. The largest is Oak Harbor with 24,163.

  1. 01Oak Harbor24,163
  2. 02Coupeville1,935
  3. 03Langley1,139
Census Vintage 2024 subcounty estimates, county parts of incorporated places (SUMLEV 157).

Counties bordering Island County

The Census 2024 county adjacency file lists 5 neighbors for Island County. The most populous is Snohomish County, WA, with 864,113 residents. Distances run between Census internal points in a straight line.

Distance to Olympia and the nearest big city

Olympia is 78.3 miles S of Island County's internal point in a straight line. The nearest place of 100,000 or more is Everett, WA (population 113,011), 25.9 miles away. The nearest place of 10,000 or more is Port Townsend, WA (population 10,649), 6.0 miles away.

Island County FIPS code

The FIPS code of Island County is 53029: state code 53 for Washington plus county code 029. Use it as text, with the leading zero, when joining Census, BLS, or CDC county tables. SAIPE lists its 2023 median household income as $88,451.

Questions people ask

What is the population of Island County, Washington?

The Census Vintage 2024 estimate for July 1, 2024 is 86,478. That is down 529 people (0.6%) from the July 2020 estimate of 87,007.

What is the FIPS code of Island County?

53029. The first two digits (53) are Washington; the last three (029) identify the county.

What is the largest town in Island County?

Oak Harbor, with 24,163 residents inside Island County in 2024.

Which counties border Island County?

5 county-equivalents border it in the Census 2024 adjacency file: Snohomish County, WA; Kitsap County, WA; Skagit County, WA; Jefferson County, WA; San Juan County, WA.

Sources and data as of

Data as of: Census Vintage 2024 population estimates, 2024 Gazetteer land area and internal points, SAIPE 2023 median household income.

  1. 01Census Vintage 2024 county population estimates
  2. 02Census 2024 Gazetteer, counties
  3. 03Census SAIPE 2023 state and county estimates
  4. 04Census Vintage 2024 subcounty population estimates
  5. 05Census 2024 county adjacency file
  6. 06Census 2024 cartographic boundary file, counties (1:5,000,000)

How every number is computed: methodology. Spotted a wrong figure? Report an error.