Anderson Island is a community in Pierce County, Washington, home to about 1,448 people across 7.9 square miles. Its ZIP code is 98303.
Homes sold for a median of $302 per square foot in the three months ending August 2026, a buyer’s market.
Each card is that ZIP code’s whole market, including any part outside Anderson Island. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Anderson Island’s story and what everyday life there is like, for people thinking about moving in.
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| Nearest major airport | Seattle–Tacoma International Airport (SEA)27 miles away |
|---|---|
| Closer regional airport | Tacoma Narrows Airport (TIW)10 miles away |
| Nearest city of 250,000+ | Seattle, WA36 miles away |
Straight-line distances from the center of Anderson Island; driving is longer.
Source: Airports from OurAirports (scheduled passenger service); city centers and populations from the U.S. Census Bureau.
Source: Members of Congress from the congress-legislators project; districts from the Census Bureau’s relationship files; governor and mayor from Wikidata.
Anderson Island had 1,302 residents in the 2020 census, up 26% since 2010.
It’s the 356th largest of 628 towns in Washington by population.
Pierce County grew from 55,515 residents in 1900 to 921,130 in 2020.
Pierce County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 76°F in summer, and winter lows average 36°F. About 42.1 inches of rain and melted snow fall in a typical year.
Source: NOAA 1991–2020 climate normals, Tacoma Narrows Ap, WA weather station (10 miles away).
294,765 jobs at 20,051 businesses in Pierce County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
1 doctors and other health care providers list an office in Anderson Island.
Nearest hospitals
Providers with an office here
| Mental health providers | 1 |
|---|
Source: Hospitals from CMS Hospital General Information (ratings are CMS overall star ratings); straight-line distances; providers from the CMS National Plan and Provider Enumeration System (NPPES), by practice address and primary specialty.
Parks (13 nearby)
Libraries
Museums (2 nearby)
Counts are within about 2 miles of the center of town.
Source: Map data © OpenStreetMap contributors (openstreetmap.org/copyright), as mapped by volunteers; it can miss places or include closed ones.
Public schools here are run by Steilacoom Hist. School District. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Anderson Island ElementaryAnderson Island | Pre-K–3 | 19 | Public | 0.6 mi |
Source: U.S. Department of Education, NCES: Common Core of Data (2024-2025) for public schools. Listed by address; we don’t rate schools.
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Town boundaries don’t always match ZIP codes: a ZIP code can cross into neighboring towns, and a town can share a ZIP code with its neighbors. Facts describe the town itself; market figures describe whole ZIP codes.