Zip Code Database List
Account Login
Find ZIP+4 of Address

Find the ZIP Code, County, and +4 of any U.S. Address

FREE ZIP Code Finder

Find info on any U.S. ZIP Code

Other FREE Lookups

Lookup ZIP Code of any City, State, County or Area Code

FREE Radius Search

Find all ZIP Codes

FREE Distance Calc

Calculate the distance between two U.S. or Canadian ZIP codes.

ZIP Code Database - Facts & Stats

Data Last Updated: June 1, 2023


COLUMBIA County, WA Covers 2 ZIP Codes

ZIP CodeClassificationCityPopulationTimezoneArea Code(s)
ZIP Code 99328GeneralDayton3,620Pacific509
ZIP Code 99359P.O. BoxStarbuck155Pacific509

Population:7,705,281 (More Details)
Male Population:3,843,772
Female Population:3,861,509
Median Age:38
ZIP Codes:2
Area Codes:0
Total Area:874 square miles (county)
Land Area:869 square miles (county)
Water Area:5 square miles (county)

COLUMBIA, WA Demographic Information

* Demographic data is based on 2020 Census.

Total population of COLUMBIA County, WA3,952
Male population of COLUMBIA County, WA1,962
Female population of COLUMBIA County, WA1,990
Median age (years)52.7
White Population3,442
Black Population11
Indian Population50
Asian Population23
Hawaiian Population1
Hispanic Population304
Median age (Male)51.7
Median age (Female)53.6
Total households1,765
Average household size for COLUMBIA County, WA2.2
Average family size of COLUMBIA County, WA3.03
Total housing units for COLUMBIA County, WA2,190

COLUMBIA County, WA Covers 2 Cities