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Hat Island aerial
Washington›Snohomish County

Hat IslandWA

A town in Washington.

Photo: Dicklyon · CC BY-SA 4.0
Photo of Hat Island

Hat Island, WA · Photo: Dicklyon · CC BY-SA 4.0 · Source ↗

Land area
1 sq mi

Is Hat Island a good place to live?

Hat Island’s peak summer temperature is 74°F, below both Washington’s towns (77°F) and U.S. towns (85°F). We don’t grade Hat Island yet; the figures below are still real.

By the sea

Hat Island lives by the ocean

Coastal flooding makes up 37% of the storm damage FEMA expects here.

37%of expected storm damage is coastal flooding
100thpercentile for coastal flood risk nationally
0thpercentile for hurricane risk

FEMA National Risk Index · OpenFEMA · OpenStreetMap

The data

Ordered by what stands out in Hat Island.

Natural hazards

Hat Island faces a very high natural-hazard risk, led by earthquakes

91risk score of 100

Expected losses in Hat Island break down as 43% from earthquakes and 37% from coastal flooding. The town’s FEMA hazard score is 91 of 100.

FEMA risk score
91Very high riskLowerHigher
EarthquakesCoastal floodingInland flooding

FEMA National Risk Index · OpenFEMA

Climate

The climate in Hat Island brings mild winters and pleasant summers

3″snow a winter

Hat Island’s January low stands at 36°F.

Typical low → high °F

Winter36–47°
Spring42–59°
Summer53–73°
Fall44–60°
Nov 2
typical first frost
Mar 24
typical last frost
+1.0°
vs. the 20th-century average

NOAA U.S. Climate Normals, 1991–2020

Health

Hat Island stands out in Washington and nationally: a smaller share of its adults binge drink

The share of adults in Hat Island who have obesity: 31%. Only 4 of the 286 Washington towns we compare have a higher share of adults who have high blood pressure than Hat Island. The town does better than the Washington average on 15 of 31 CDC measures and worse on 8.

Hat IslandWashington townsU.S. towns
Frequent mental distress (CDC PLACES)13%17%17%
High blood pressure (CDC PLACES)41%31%35%
Binge drink (CDC PLACES)13%17%16%
Sleep under 7 hours (CDC PLACES)28%33%36%
31 measures vs. Washington
15 better8 too close to call8 worse
What stands outHat IslandWA
Fewer adults facing housing insecurity6.1%9.9%
Fewer uninsured adults5.3%8.4%
More adults who have had cancer14.4%7.9%
Providence Regional Medical Center Everett
5.3 mi away · emergency room
None
primary care, dental or mental-health shortage

CDC PLACES 2025 · modeled estimates for adults · CMS · HRSA

1
homes sold in September

Zillow Home Value Index · Redfin Data Center

Keep exploring

Everything we know about Hat Island

13pages on Hat Island
Nearby attractions

Space Needle and 124 more within 40 miles

Museums, parks, gardens and other places to visit around Hat Island. Close and well known come first.

All 158 attractions →
Sources: National Park Service · ski areas © OpenSkiMap / OpenStreetMap contributors · Wikidata · Wikipedia readership · photos via Wikimedia Commons
Photo credits

Space Needle: Another Believer, CC BY-SA 4.0 · Climate Pledge Arena: Sea Cow, CC BY-SA 4.0 · Lumen Field: "Smart Destinations", GoSeattleCard.com, and Go Seattle Card Blog, CC BY-SA 2.0 · Olympic National Park: Wsiegmund, CC BY 2.5 · T-Mobile Park: MyName (Cacophony), CC BY-SA 3.0 · Seattle Underground: Mark Hursh, CC BY-SA 3.0

Getting set up

Moving to Hat Island: who provides what

Hat Island is unincorporated, so Snohomish County and regional agencies provide most services.

PowerPUD No 1 of Snohomish County12.1¢/kWh · EIA 2025HIFLD · EIA
WaterHat Island Community Inc water systemNo health-based violations in 5 years · EPAEPA
Internet2 providers0% of addresses get 100/20 MbpsFCC
Trash & county servicesSnohomish CountySnohomish County provides services here
SchoolsMukilteo School DistrictWhich school depends on your addressNCES
Register to voteOnlineIn Washington you can register online until 8 days before Election Day, in person up to and including Election Day, or by mail (received 8 days before).vote.gov
Who runs elections hereSnohomish County AuditorSnohomish County; contacts on the Handbook page.FVAP, Sep 2022
ZIP code9820198201 100%Census 2020

EPA SDWIS (Oct 9, 2026) · HIFLD + EIA-861 2025 · Census 2020 ZCTAs · NCES 2024–25 · registration: vote.gov, updated Sep 30, 2026.

After high school

Colleges nearby

2 within 15 miles of the center of Hat Island

About Hat Island

CDP and Island in Puget Sound

Hat Island (Lushootseed: č̓əč̓əsəliʔ), also known as Gedney Island, is a small island in Possession Sound in the U.S. state of Washington. The island is covered by a census-designated place (CDP) that is part of Snohomish County. The population is 26 as of 2025. The island lies between the mainland city of Everett, Washington, and the southern part of Whidbey Island; it has a land area of 1.768 km2 (436.8 acres).

From Wikipedia, licensed CC BY-SA 4.0 · facts via Wikidata (CC0)

Area
0.7 sq mi
Elevation
207 ft
Area code
425

Questions about Hat Island

Short answers, built from the data on this page.

Is Hat Island, WA a good place to live?

We don’t grade Hat Island yet; the figures below are still real. A town in Washington.

Hat Island is in here

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