Yelm, WA is a city located in Thurston County, Washington and has a land area of 111.02 square miles (287.54 km2). The water area for the city is 3.78 square miles or 9.79 km2. There is one unique zip code in Yelm, Washington and it is 98597. The area code(s) for Yelm is 360/564.
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