Mountlake Terrace, WA is a city located in Snohomish County, Washington and has a land area of 4.05 square miles (10.49 km2). The water area for the city is 0.10 square miles or 0.26 km2. There is one unique zip code in Mountlake Terrace, Washington and it is 98043. The area code(s) for Mountlake Terrace is 425.
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