Loon Lake’s post office opened in 1890, and 1 of its places is on the National Register
Most of Loon Lake was built recently: 2% of its homes predate 1940 and the median home dates from 1998. Its Register listing is the Loon Lake School. Below: maps from 1965 on.
Wikipedia doesn’t have a history of Loon Lake yet. The photos, dates and memories neighbors add here are how it gets written.
Loon Lake is an unincorporated community and census-designated place in Stevens County, Washington, United States. Loon Lake is located on the northern shore of Loon Lake 5 miles (8.0 km) east of Springdale. The community is served by U.S. Route 395 and Washington State Route 292. Loon Lake has a post office with ZIP code 99148.
Its first post office opened in 1890. Between the 2010 and 2020 censuses its population grew from 783 to 898 (+15%).
Intro from Wikipedia. Population: U.S. Census Bureau.
Timeline
Loon Lake, 1890 to 1965
Woven from the archive, old maps, post office records, the National Register and the people born here.
Founding dates: Wikidata, Wikipedia, the U.S. post office records of Blevins & Helbock (CC0) and the Census. Homes by year built: Census ACS 2020–24. National Register of Historic Places: National Park Service (list of May 22, 2026). Old photos, postcards and papers: Wikimedia Commons, the Library of Congress and other public archives, credited on each item’s page. Maps: U.S. Geological Survey historical topographic maps (via Esri) and Sanborn fire-insurance maps (Library of Congress). History text and census tables: Wikipedia (CC BY-SA 4.0). Places that used to be: USGS Geographic Names Information System (2021). How TownRatings grades history →
From the National Register of Historic Places (1), U.S. Geological Survey historical maps, the US Post Offices dataset (Blevins & Helbock) and the USGS Geographic Names Information System. Archive images are copied here with their credits and licenses, shown on each photo’s page. Refreshed monthly.