ZIP Code 99020
About Marshall
Marshall is an unincorporated community in Spokane County, Washington, United States. Named in 1880 for early settler William H. Marshall, Marshall has a post office with ZIP code 99020.
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Area Profile
US Census (ACS 5-year · Gazetteer)
15
population
349
people / sq mi
7
housing units
7
households
0.0
land area (sq mi)