Find the last 4 digits (ZIP+4) for an address in 98278

ZIP 98278, Oak Harbor, WA is filled in. Just type the street address.

Addresses are checked through our secure proxy. Bot checks use Cloudflare Turnstile. Each device can run 5 live checks per day; repeats of the same address are free.

ZIP Code 98278 – Oak Harbor, WA

Oak Harbor, Washington · Island County · Pacific time

ZIP code98278
CityOak Harbor
StateWashington
CountyIsland County
Population1,932
Time zonePacific · local time
ZIP typeStandard (has a Census ZCTA area)
Land area4.22 sq mi
Center (lat, long)48.3406, -122.6740

Area codes in this area

360564

These are the area codes that most often serve ZIP 98278 (including overlays). The exact area code depends on the phone number — landlines, mobiles and overlays can differ even on the same street.

Map

Nearby ZIP codes

98277 Oak Harbor · 2.5 mi98221 Anacortes · 8.5 mi98257 La Conner · 8.7 mi98239 Coupeville · 9.9 mi98282 Camano Island · 11.9 mi98261 Lopez Island · 13.7 mi98273 Mount Vernon · 14.3 mi98238 Conway · 15.1 mi

About ZIP 98278

ZIP code 98278 is assigned to Oak Harbor, Washington. It lies in Island County. Its Census area covers about 4.22 square miles of land. The closest neighboring ZIP is 98277 (Oak Harbor), about 2.5 miles away.

Every address in 98278 also has a 4-digit add-on code (ZIP+4) that points to a smaller delivery area. Use the box above to find it.

Sources: US Census Bureau (ZCTA, county relationship files), GeoNames (CC BY 4.0), NANPA via NumberResearch.org (CC BY 4.0). Map © OpenStreetMap contributors. ZIP areas are approximate. Population: U.S. Census Bureau, ACS 5-year estimates, 2024 (ZCTA). Data sources