ZIP code
99328
Dayton, WA
99328 covers Dayton in Columbia County, with 3,595 people in the ACS 2023 estimate.
Figures are for the Census ZIP Code Tabulation Area (ZCTA), which is not the same as a USPS ZIP code. A PO Box or unique ZIP may have no ZCTA and no demographics. Methodology
U.S. Census Bureau, ACS 2019–2023 5-year (vintage 2023). Geography: ZCTA 99328. Methodology
ZIP code map of 99328

About ZIP code 99328
More enterprise fields
Commercial ZIP directory · not ACS
Commercial ZIP directory population_count for ZCTA 99328. Not ACS. Methodology
People in 99328
Race
- White3,154
- Black or African American11
- American Indian or Alaska Native47
- Asian20
- Native Hawaiian and Pacific Islander1
- Other race114
- Two or more races273
Hispanic or Latino (any race): 293
Age
- Under 10313
- 10 to 19385
- 20 to 29307
- 30 to 39346
- 40 to 49368
- 50 to 59555
- 60 to 69654
- 70 to 79451
- 80 and older241
Income and housing in 99328
Education
- High school graduate88.2%
- Bachelor's degree26.0%
- Graduate degree11.5%
Places covering 99328
Cities and places — Population overlap
Share of this ZIP/ZCTA’s population located within each place, based on ZIP Code Database place-overlap data. This is a population measure, not land-area overlap or the Census-place population.
- Dayton67.6%
ZIP Code Database place-overlap table, field percent_of_zip_population_in_place, keyed by place_geoid. Not ACS 2019–2023. Overlap vintage is the shipped overlap table and is separate from ACS. Methodology
Counties — Population overlap
Share of this ZIP/ZCTA’s population located within each county, based on ZIP Code Database county-overlap data. This is a population measure, not land-area overlap or the Census county population.
- Columbia County100.0%
ZIP Code Database county-overlap table, field percent_of_zip_population_in_county, keyed by county_geoid. Not ACS 2019–2023. Overlap vintage is the shipped overlap table and is separate from ACS. Methodology
32.4% of this ZIP is outside city limits (a real overlap row, not missing data).
Population history for 99328
Hover the chart or read the table below (Year | ACS | IRS).
| Year | ACS population | IRS population |
|---|---|---|
| 2005 | 3,159 | |
| 2006 | 3,049 | |
| 2007 | 3,486 | |
| 2008 | 3,185 | |
| 2009 | 3,186 | |
| 2010 | 3,052 | |
| 2011 | 3,727 | 2,987 |
| 2012 | 3,759 | 3,030 |
| 2013 | 3,830 | 2,950 |
| 2014 | 3,753 | 2,980 |
| 2015 | 3,713 | 2,980 |
| 2016 | 3,683 | 2,970 |
| 2017 | 3,685 | 2,960 |
| 2018 | 3,709 | 2,930 |
| 2019 | 3,715 | 3,010 |
| 2020 | 3,718 | 2,970 |
| 2021 | 3,616 | 3,060 |
| 2022 | 3,669 | 2,970 |
| 2023 | 3,595 |
ACS: U.S. Census Bureau American Community Survey 5-year estimates. IRS: Statistics of Income ZIP Code data.
ZIP codes near 99328
12 nearest ZIP centroids (any distance)
- 99361Waitsburg13.3 miPop 1,800 · Income $91,742
- 99329Dixie16.2 miPop 122 · Income —
- 99347Pomeroy17.4 miPop 2,467 · Income $61,741
- 99359Starbuck21.5 miPop 107 · Income $49,500
- 99362Walla Walla24.4 miPop 42,794 · Income $70,660
- 99402Asotin25.1 miPop 1,628 · Income $80,428
- 99136Hay27.8 miPop 19 · Income —
- 99348Prescott28.3 miPop 1,733 · Income $76,431
- 99403Clarkston28.5 miPop 20,483 · Income $67,424
- 99324College Place29.4 miPop 10,171 · Income $64,485
- 99333Hooper31.8 miPop 104 · Income $95,455
- 97862Milton Freewater32.4 miPop 12,538 · Income $54,013
ZIP centroids within 2 miles
No other ZIP codes within 2 miles of 99328, measured by Census internal-point centroids. Try a wider radius.
ZIPs within 2 miles of this place
Default is 2 miles. Distances are between ZIP centroids. Widen the radius if nothing is in range.
ZIP code 99328 FAQ
- What city is ZIP code 99328 in?
- 99328 is in Dayton, WA.
- What county is 99328 in?
- 99328 is in Columbia County.
- What is the median household income in 99328?
- The median household income in 99328 is $72,233.
- Which ZIP codes are near 99328?
- Use the radius tool on this page to list ZIP codes within a chosen distance of 99328.