Loomis, WA is a city located in Okanogan County, Washington and has a land area of 319.70 square miles (828.02 km2). The water area for the city is 4.44 square miles or 11.50 km2. There is one unique zip code in Loomis, Washington and it is 98827. The area code(s) for Loomis is 509.
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