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
National ZIP placement
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.
FHFA HPI release change
What changed in the latest House Price Index year
- FHFA House Price Index values in ZIP 99328 (Dayton, WA) rose +4.5% from 2023 to 2024. The all-transactions index moved from 315.5 in 2023 to 329.6 in 2024 (2000 = 100).
ZIP code 99328 covers 1696.8 square miles in Dayton, Columbia County, Washington (a standard USPS delivery area), with a modest 3,733 residents on file, a density of 2 people per square mile, in the Los Angeles time zone.
ZIP 99328 lands in the middle-income range, with a median household income of $72,756 (20% below the average Washington ZIP), while per-capita income is $40,778. The poverty rate is 9.6%, with unemployment at 4.1%; those measures add context to the income figure. Home values sit below the statewide ZIP benchmark: the median is $272,100 (47% below the average Washington ZIP), and median rent is $982; owner occupancy is 77.4%.
Educational attainment sits below the national norm: 24.0% of adults hold a bachelor's degree or higher, the median age is 49.3, and the average commute is -. No nearby ZIP peer set is available for this delivery area, so the Washington and national benchmarks above are the appropriate context for 99328.
Every figure on this page is sourced from the U.S. Census Bureau American Community Survey 5-Year Estimates (including median rent) and the FHFA House Price Index, no estimates, no proprietary scoring. Verify with Census →
Top industries in ZIP 99328
Top 5 sectors by establishment count in Dayton, WA
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 + FHFA HPI ACS demographics and median rent, ZBP business establishments, 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; 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 ZIP avg
$40,778
Per Capita Income
9.6%
Poverty Rate
4.1%
Unemployment Rate
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?
Housing stock: occupied vs vacant
1,977housing units
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 ZIP avg
$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.
Nationwide ZIPs with similar ACS profiles
Two Census-derived peer sets for ZIP 99328, both outside WA so the neighborhoods are not geographic containment (Nearby and same-county blocks stay local).
Similar population
Nearest cross-state ZIPs by resident population (3,733 here; floor ≥1,000).
Similar median household income
Nearest cross-state ZIPs by ACS median household income.