Residential delivery area · Washington
ZIP Code 98528: Belfair, WA
ZIP code 98528 uses the postal name Belfair, Washington and lies entirely in Mason County (Census 2020 ZIP-county file). About 12,000 people live there (Census Bureau, ACS 2020-2024). Median household income is $91,058 (Census Bureau, ACS 2020-2024). By Census place, 10% of its land lies in Belfair (a census-designated place); 90% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Belfair · its only residential ZIP
- County
- Mason County
- Census places
- Belfair census-designated place
- Micro area
- Shelton, WA
- House district
- WA-6 119th Congress
- State
- Washington
- Time zone
- Pacific
- Land area
- 72.3 sq mi · 165 people per sq mi
Where is ZIP code 98528?
98528 centers on 47.447°, -122.896° and covers 72.3 square miles of land plus 12.5 of water. It borders 8 ZIP codes: 98524, 98588, 98546, 98329, 98312, 98380, 98367, 98592.
The map draws ZIP code areas only. For the streets inside 98528, open its center on OpenStreetMap.
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries and the 2023 Gazetteer (2020 ZCTAs); ZIP-to-county shares, Census places and House districts (119th Congress) from the Census 2020 relationship files (shares of land); metro area from the OMB delineation (July 2023); town name and time zone from simplemaps US ZIP Codes (CC BY 4.0).
How does 98528 compare with the rest of Mason County?
| Measure | 98528 | In Mason County | In WA |
|---|---|---|---|
| People (ACS 2020-2024) | 11,940 | 2nd of 12 | 220th of 605 |
| Median household income | $91k | 4th of 8 | 190th of 363 |
| Median home value | $430k | 5th of 9 | 256th of 392 |
Its median household income is higher than in 74% of U.S. residential ZIP codes, and it is denser than 60% of all U.S. residential ZIP codes. ZIP codes at the ACS caps ($250,000 or more for household income, $2,000,000 or more for home value) share the top rank.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B19013, B25077); ranks by PlainZIP over residential ZIP codes (ZCTAs).
How many people live in 98528?
The 2020 Census counted 11,052 people in 98528; the ACS, which samples households over 2020-2024, estimates 11,940. Between the 2010 and 2020 censuses its population grew 10.7% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 11,940
- 2020 Census count
- 11,052+10.7% since 2010 (9,983)
- Households
- 4,412
- Median age
- 42.2
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B01002, B11001); 2020 Census (DHC P1); 2010 Census (SF1 P1).
Who lives in 98528?
Of the 11,940 people the ACS estimates in 98528, 24.1% are under 18 and 23.2% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (76.6%), then Other or two or more (10.7%).
- Under 1824.1%
- 18 to 6452.7%
- 65 and older23.2%
- White, not Hispanic76.6%
- Other or two or more10.7%
- Hispanic or Latino9.1%
- Asian, not Hispanic2.0%
- Black, not Hispanic1.7%
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01001 age by sex, B03002 Hispanic or Latino origin by race); shares of the estimated population, small ZIP codes carry wide margins.
What do households in 98528 earn?
Median household income is $91,058 (ACS 2020-2024), the 4th highest of the 8 ranked ZIP codes in Mason County. It rose from $70,227 in 2015-2019 (in 2024 dollars), a change larger than the surveys' margins of error.
- Median household income
- $91,058
- Income per person
- $40,673
- Below the poverty line
- 7.9%
- Unemployed (of the labor force)
- 6.5%
- Adults 25+ with a bachelor's degree
- 19.1%
- Adjusted gross income per tax return, 2022
- $79,7545,410 returns; wages 63% of AGI (IRS)
Source: U.S. Census Bureau, ACS 2020-2024 and 2015-2019 5-year estimates (B19013, B19301, B17001, B23025, B15003; 2015-2019 dollars converted with the BLS CPI-U, 1.22699); IRS Statistics of Income, ZIP code data, tax year 2022 (adjusted gross income per return, filed under the address on the return).
What are homes worth in 98528?
FHFA's house price index for 98528, built from repeat sales and appraisals of the same homes, rose 133% from 2015 to 2025 and rose 52% from 2020 to 2025, and moved +4.4% in 2025.
- Median home value (owners' estimate)
- $430,200
- Median gross rent
- $1,216
- Homes owned by their occupants
- 80.6%
- Housing units
- 5,379
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B25077, B25064, B25003, B25001); FHFA House Price Index, annual five-digit ZIP, updated 2026-03-31.
What businesses are in 98528?
218 business establishments had a location in this ZIP code in 2023, 3 more than in 2018; the most are in construction (ZIP Code Business Patterns).
- Construction39
- Retail trade35
- Accommodation and food services29
- Other services (except public administration)21
- Administrative and support and waste management and remediation services17
- Health care and social assistance17
Source: U.S. Census Bureau, ZIP Code Business Patterns 2023 and 2018 (establishments with paid employees, by the business's ZIP code).
Which ZIP codes are next to 98528?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 98524 | Allyn | 4,300 | $100k | 6.2 mi |
| 98588 | Tahuya | 2,114 | $62k | 6.4 mi |
| 98546 | Grapeview | 2,430 | $97k | 8.7 mi |
| 98329 | Gig Harbor | 11,552 | $110k | 9.3 mi |
| 98312 | Bremerton | 36,307 | $90k | 10.3 mi |
| 98380 | Seabeck | 5,471 | $125k | 10.7 mi |
| 98367 | Port Orchard | 31,756 | $116k | 10.8 mi |
| 98592 | Union | 2,059 | $138k | 11.5 mi |
| 98555 | Lilliwaup | 324 | – | 9.8 mi (near) |
| 98394 | Vaughn | 892 | – | 10.1 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.