The County of Columbia contains 1 unique zip code(s). Columbia County covers 873.60 square miles and with a population of 3733 has a population density of 4.67 people per square mile.

Zipcodes within Columbia County Limits
99328 Dayton, WA
2010 Population:3733
Display Map of Zip Code 99328 with  City Limits
Zipcodes within Columbia County and Neighboring Counties
Display Map of Zip Code 99328 with  City Limits99143 La Crosse, WA
2010 Population:650
Display Map of Zip Code 99328 with  City Limits99347 Pomeroy, WA
2010 Population:2293
Display Map of Zip Code 99328 with  City Limits99348 Prescott, WA
2010 Population:1364
Display Map of Zip Code 99328 with  City Limits99361 Waitsburg, WA
2010 Population:1902
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