Dayton, WA · standard
ZIP Code 99328
Columbia County, Washington - Census ACS demographics, housing tenure, and business patterns, benchmarked against every US ZIP.
- 3,733
- 2/sq mi
- $72,756
- Median income
- $272,100
- Median home value
- 24.0%
- Bachelor's or higher
The verdict
Dayton pairs an above-median household income with above-median home values, in a rural, homeowner-dominated area.
- Top 49%
- household income, US ZIPs
- Top 38%
- home value, US ZIPs
- 2
- people per sq mi
- 77%
- owner-occupied homes
Source: U.S. Census Bureau ACS 5-Year Estimates (2019–2023). Percentiles rank ZIP 99328 against every reporting US ZIP.
ZIP code 99328 is classified by USPS as a standard delivery area and covers roughly 1696.8 square miles in Dayton, Columbia County, Washington. The area is home to 3,733 residents, producing a population density of 2 people per square mile, and falls within the Los Angeles time zone. These USPS and Census boundary values drive every downstream statistic on this page, including the benchmarks that compare 99328 against Washington and the nation.
On the economic side, the median household income for ZIP 99328 sits at $72,756 (20% below the Washington average), while per-capita income is $40,778. The poverty rate stands at 9.6% and the unemployment rate at 4.1%. On housing, the median home value is $272,100 (47% below the state average) with median rent at $982 per month, and 77.4% of occupied units are owner-occupied, a direct signal of whether 99328 behaves more like a homeowner neighborhood or a renter-heavy ZIP.
Education and household profile round out the picture: 24.0% of adults hold a bachelor's degree or higher, the median age is 49.3, and the average commute is —. Use the benchmarks above to see where 99328 sits relative to Washington and the national baseline rather than viewing the numbers in isolation. Every figure is sourced from the U.S. Census Bureau American Community Survey 5-Year Estimates, HUD Fair Market Rents, and FHFA Home Price Index data, no estimates, no proprietary scoring. Verify with HUD →
Top industries in ZIP 99328
Top 5 sectors by establishment count
Which industries have the most business establishments in ZIP 99328.
- Retail trade
Retail trade
15 establishments
- Wholesale trade
Wholesale trade
11 establishments
- Other services (except public administration)
Other services (except public administration)
11 establishments
- Construction
Construction
8 establishments
- Health care and social assistance
Health care and social assistance
8 establishments
What this shows Establishment counts come from the Census ZIP Code Business Patterns program, which counts physical business locations rather than employees or revenue.
Source: U.S. Census Bureau, American Community Survey 5-Year Estimates + ZIP Code Business Patterns + HUD FMR + FHFA HPI ACS demographics, ZBP business establishments, HUD Fair Market Rents, FHFA HPI for ZIP 99328, Dayton, WA · 2023 Census ACS 5-Year Estimates use a rolling 60-month sample for stable small-geography estimates; ZBP updated annually; HUD FMR + FHFA HPI updated quarterly/annually.
Quick Facts
3,733
Population
1696.8
Area (sq mi)
2
People / sq mi
Los Angeles
Time Zone
standard
ZIP Type
Who lives in ZIP 99328?
49.3
Median Age
49.9%
Male
50.1%
Female
5.5%
Foreign-Born
Hispanic or Latino is an ethnicity category from the Census Bureau and may overlap with other categories above.
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
How much do residents earn?
$72,756
Median Household Income
-20% vs state
$40,778
Per Capita Income
9.6%
Poverty Rate
4.1%
Unemployment Rate
How ZIP 99328 ranks nationally
Household income vs. every US ZIP code
Median household income — the full national distribution, with this ZIP marked
$72,756 Top 49% higher than 51% of 30,318 US ZIPs
Each bar is a $20K-wide band; taller bars hold more US ZIPs. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source U.S. Census Bureau — ACS 5-Year Estimates · 2019–2023
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
What is the education profile here?
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
What does housing look like?
1,977
Total Housing Units
1,667
Occupied Units
310
Vacant Units
2.15
Avg Household Size
Occupancy Type
$272,100
Median Home Value
-47% vs state
$982
Median Rent
1951
Median Year Built
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
How have home values changed over time?
FHFA House Price Index, annual appreciation data based on repeat sales and appraisals
+4.5%
YoY Change (2024)
330
HPI Index (2000 = 100)
+230%
Total Change Since 2000
Home values in ZIP 99328 have increased 4.5% over the past year (2024). Since 2000, this ZIP has seen +230% cumulative appreciation.
| Year | Annual Change | HPI Index |
|---|---|---|
| 2020 | +5.1% | 222 |
| 2021 | +17.9% | 262 |
| 2022 | +21.6% | 319 |
| 2023 | -1.0% | 316 |
| 2024 | +4.5% | 330 |
Source: Federal Housing Finance Agency (FHFA) House Price Index, All-Transactions, Five-Digit ZIP Codes (Developmental Index). Index base = 100 in year 2000. Data through 2024. ZIP codes with few transactions may show missing values.
What businesses operate in this ZIP?
Census Bureau data shows 100 business establishments in ZIP 99328, employing approximately 876 people with a combined annual payroll of $41,733,000.
100
Businesses
876
Employees
$41.7M
Annual Payroll
13
Industry Sectors
| Industry | Establishments | % of Total |
|---|---|---|
| Retail trade | 15 | 15.0% |
| Wholesale trade | 11 | 11.0% |
| Other services (except public administration) | 11 | 11.0% |
| Construction | 8 | 8.0% |
| Health care and social assistance | 8 | 8.0% |
| Accommodation and food services | 8 | 8.0% |
| Manufacturing | 6 | 6.0% |
| Professional, scientific, and technical services | 6 | 6.0% |
| Utilities | 5 | 5.0% |
| Arts, entertainment, and recreation | 5 | 5.0% |
| Real estate and rental and leasing | 4 | 4.0% |
| Information | 3 | 3.0% |
| Finance and insurance | 3 | 3.0% |
Source: U.S. Census Bureau, ZIP Code Business Patterns (ZBP), 2023. Employment figures may include noise for disclosure avoidance.
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Frequently Asked Questions
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ZIP Code Research Guides
Official Data Resources for Dayton, WA
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Read our methodology to see how this data is sourced, computed, and verified.