Hamilton is a town in Skagit County, Washington, home to about 252 people across 1.2 square miles. Its ZIP code is 98255, and parts of 98284 are in Hamilton too.
Homes sold for a median of $288 per square foot in the three months ending August 2026, a seller’s market.
All in Hamilton
Mostly Sedro-Woolley; part is in Hamilton
Each card is that ZIP code’s whole market, including any part outside Hamilton. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Hamilton’s story and what everyday life there is like, for people thinking about moving in.
Are you a local agent who knows Hamilton well? Agents who advertise here will be able to write the guide. Advertise on OfferBacked
| Nearest major airport | Seattle–Tacoma International Airport (SEA)75 miles away |
|---|---|
| Closer regional airport | Arlington Municipal Airport25 miles away |
| Nearest city of 250,000+ | Seattle, WA64 miles away |
Straight-line distances from the center of Hamilton; 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.
Hamilton had 299 residents in the 2020 census, down 3% since 2000.
It’s the 536th largest of 628 towns in Washington by population.
Skagit County grew from 14,272 residents in 1900 to 129,523 in 2020.
Skagit County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 75°F in summer, and winter lows average 34°F. About 48.7 inches of rain and melted snow fall in a typical year, with about 6 inches of snow.
Source: NOAA 1991–2020 climate normals, Sedro-Woolley, WA weather station (7 miles away).
44,636 jobs at 3,670 businesses in Skagit County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
Nearest hospitals
Source: Hospitals from CMS Hospital General Information (ratings are CMS overall star ratings); straight-line distances.
Parks (1 nearby)
Counts are within about 1 mile 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.
Buying or selling around Hamilton? Tell us what you need and when. No agents advertise here yet, so we’ll keep your request for up to 30 days and send it to local agents who join. No obligation, and you choose who to work with.
Loading map…
Shares ZIP codes with Sedro-Woolley, Lyman and Clear Lake (Skagit County).
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.