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Area data

Dayton, WA — ZIP 99328

Population: 3,646 (Census ACS)

The median home value in ZIP 99328 (Dayton, WA) is $280,745 — up 1.1% over the past year. 4 schools serve the area (NCES). FEMA's National Risk Index rates the county's overall natural-hazard risk Very Low. Cost of living is 7.5% above the US average (BEA, metro/state-level).

Backed by 25+ public sourcesFEMA · U.S. Census · NOAA · Dept. of Education · EPA · and more

$280,745

Median home value

+1.1%

1-year change

Very Low

Hazard risk (county)

Home values & appreciation

Median home value
$280,745
1-year appreciation
+1.1%
3-year appreciation
+6.2%
5-year appreciation
+17.1%
10-year appreciation
+77.2%
All-time peak (2025-05)
$280,843
House Price Index (state)
588.1 (+2.2% YoY)

Sources: home value index (ZIP-level) · FHFA House Price Index (state-level)

Market activity

For-sale inventory
30
New listings (monthly)
10

Source: recent area sales and market data (ZIP-level)

Affordability

Cost of living index (Above Average)
107.5 (100 = US avg)
Electricity rate (state-level)
13.1¢/kWh
Natural gas rate (state-level)
$17.60/MCF
30-year mortgage rate (national)
6.66%
15-year mortgage rate (national)
6.00%

Sources: BEA Regional Price Parities (metro/state-level) · EIA energy rates (state-level) · Freddie Mac PMMS (national)

Schools

Total schools
4
Elementary schools
1
Middle schools
1
High schools
2
Schools include
Dayton Elementary School, Dayton High School, Dayton Middle School, Dayton School District Alternative Program

Source: NCES school directory, 2022-23 (school-address-based)

Natural hazards & flood risk

Overall hazard risk (county)
Very Low
Notable hazard ratings (county)
avalanche: Relatively Low · iceStorm: Relatively Low · landslide: Relatively Low · wildfire: Relatively Low
Wildfire risk to homes (county)
Higher than 90% of US counties
Buildings in wildfire direct-exposure zone
51.4%
Radon potential (county)
Moderate radon potential — EPA Zone 2 of 3
EPA Superfund (NPL) sites within 5 mi
None
EPA recommends radon testing for every home regardless of zone.

Sources: FEMA National Risk Index (county-level) · FEMA flood data (ZIP-level) · USDA Forest Service Wildfire Risk to Communities (county-level) · EPA radon zones + Superfund NPL

Climate (30-year normals)

Annual precipitation
58.2 in
USDA plant hardiness zone
7a (extreme annual low 0 to 5°F)

Sources: NOAA Climate Normals (30-year, nearest-station) · USDA Plant Hardiness Zone Map (2023)

Air quality

Air quality rating
Good
Median AQI (annual)
39
Days with Good air quality
319
Days with Moderate air quality
43
Days with Unhealthy air quality
2
Highest AQI recorded (year)
259

Source: EPA air quality data (nearest monitoring station, annual)

Amenities

National parks within ~60 mi
2
Nearest national park
Whitman Mission National Historic Site (35 mi)
National parks include
Whitman Mission National Historic Site, Ice Age Floods National Geologic Trail
Airports within 30 mi
10
Nearest airport
Touchet Valley Airport (10 mi)
Nearest major airport
Walla Walla Regional Airport (ALW) (26 mi)
Hospitals nearby (~15 mi)
1
Hospitals include
DAYTON GENERAL HOSPITAL
Solar radiation rating
Fair (4.2 kWh/m²/day)

Sources: National Park Service · FAA airport data · CMS hospital data · DOE/NREL (proximity-based)

Migration

Net migration (county)
+24 tax filers

Source: IRS county-to-county migration data (county-level, ~12-month lag)

Housing stock

Median year housing built
1,951
Housing built before 1970
65.7%
Housing built 2000 or later
15.3%
Median annual property tax
$2,273
Households with broadband internet
50.3%

Source: Census ACS 5-year estimates (ZIP-level)

Employment & development

Total county employment
977
Average weekly wage
$1,328
Top industries (by employment)
Agriculture, Construction, Other Services
Annual residential building permits (county)
7

Sources: BLS QCEW (county-level) · Census Building Permits (county-level)

How it compares

ZIP 99328State medianUS median
Median home value$280,745$504,993$289,727
Median annual property tax$2,273$3,381$2,006

State and US medians are computed across all US ZIP codes with sufficient public-data coverage, from the same sources as the figures above.

Area data compiled from public government, academic, and industry research feeds. Data sources →

Common questions

What is the median home value in ZIP 99328?
$280,745.
What is the natural-hazard risk in ZIP 99328?
Overall risk: Very Low (FEMA NRI, county-level).
What is the wildfire risk in ZIP 99328?
Risk to homes is higher than 90% of US counties (USDA Forest Service Wildfire Risk to Communities, county-level).
What is the radon potential in ZIP 99328?
Moderate radon potential — EPA Zone 2 of 3, county-level. EPA recommends testing every home regardless of zone.
Are there Superfund sites near ZIP 99328?
No current or proposed National Priorities List sites within 5 miles (EPA).
How many schools serve ZIP 99328?
4 schools (1 elementary, 1 middle, 2 high) (NCES, 2022-23).
What is the air quality in ZIP 99328?
Good. Median AQI: 39. (EPA AQI).
What is the cost of living in ZIP 99328?
Regional Price Parity: 107.5 (100 = US average) (Above Average) (BEA RPP, metro/state-level).

Nearby ZIP codes

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Data last updated

Most recent source refresh: Sep 2026. See all data sources →

Data compiled by REAIGENT7 — AI listing platform for real estate agents