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Newcastle, WA
City in King County, Washington. ZIP codes: 98056, 98059.
Population
12,989
Land area
4.4sq mi
People per sq mi
2,929
ZIP codes
2
Newcastle and its ZIP codes
Newcastle at a glance
- Newcastle is about 25 times as dense as Washington as a whole.
- It is the 104th most populous of 628 cities and towns in Washington.
- Households here earn a median of $160,278 a year, 63% more than the Washington figure of $98,141.
- A typical owner-occupied home is valued at $1,205,600 (about 2.1 times the Washington figure) and median rent is $2,369 a month.
Local data for Newcastle, WA
Counts from official public data
Housing and community stats
Newcastle, WA, American Community Survey 2020-2024
Median household income
$160,278
Poverty rate
5.9%
Median home value
$1,205,600
Median rent
$2,369/mo
Homeownership
61.0%
Bachelor's or higher
68.5%
Median age
37.5
Average commute
27.9 min
Largest reported origins and ancestries: Chinese Americans (2,200), German Americans (1,132), Indian Americans (731).
Economy and federal money
Jobs, pay, income and spending are for King County. PPP loans are for Newcastle.
Unemployment rate
4.7%
Aug 2026, 0.0 pts in a year
Average annual pay
$136,848
1,436,484 jobs, 2025
Income per person
$128,684
BEA, 2024
Federal spending
$24.61B
FY 2026, $10,843 per person
How people get to work
Newcastle, WA, workers 16 and older. American Community Survey 5-year estimates
- Drove alone57.8%
- Carpooled4.6%
- Public transit2.5%
- Walked2.4%
- Bicycle1.3%
- Taxi, ride-hailing, motorcycle or other1.2%
- Worked from home30.2%
Average one-way commute: 27.9 minutes for people who do not work from home.
Environment and hazard risk
Newcastle, WA, from FEMA, NOAA and EPA
Natural hazard risk
Very High
Top: earthquake
Storm events since 1996
75
Countywide, mostly lightning
Flood insurance policies
4,529
0.8% of homes, county
July high / Jan low
77° / 37°F
34.7 inches of rain a year
Hazards, floods and storm historyCheck a flood zone1 historic places
Health statistics
Share of adults in Newcastle, WA, CDC PLACES estimates
Obesity
19.7%
U.S. 33.3% -13.6 pts
Diabetes
7.2%
U.S. 12.1% -4.9 pts
Smoking
5.5%
U.S. 12.8% -7.3 pts
Uninsured (18-64)
4.6%
U.S. 11.1% -6.5 pts
ZIP codes in Newcastle
2 in or overlapping Newcastle. Population shown
Cities near Newcastle
| Name | Distance | Land area (sq mi) |
|---|---|---|
| RentonCity | 3.7 mi | 23.5 |
| Mercer IslandCity | 3.8 mi | 6.4 |
| Beaux Arts VillageTown | 4.4 mi | 0.1 |
| Bryn Mawr-SkywayCensus-designated place | 4.6 mi | 2.9 |
| BellevueCity | 4.8 mi | 33.5 |
| East Renton HighlandsCensus-designated place | 5.4 mi | 11.1 |
| FairwoodCensus-designated place | 5.8 mi | 4.7 |
| IssaquahCity | 6 mi | 12.1 |
| TukwilaCity | 6.5 mi | 9.2 |
| Maple Heights-Lake DesireCensus-designated place | 6.7 mi | 4.1 |
| SammamishCity | 7.3 mi | 20.4 |
| Boulevard ParkCensus-designated place | 7.4 mi | 1.2 |
| Clyde HillCity | 7.7 mi | 1.1 |
| MedinaCity | 7.8 mi | 1.4 |
| Yarrow PointTown | 8.5 mi | 0.4 |
| Hunts PointTown | 8.6 mi | 0.3 |
Frequently asked questions
- What county is Newcastle, WA in?
- Newcastle is in King County, Washington.
- What ZIP codes are in Newcastle, WA?
- ZIP codes in or overlapping Newcastle include 98056, 98059.
- What is the population of Newcastle, WA?
- About 12,989 people live in Newcastle, based on American Community Survey 5-year estimates.
- What cities are near Newcastle?
- Nearby places include Renton (3.7 mi), Mercer Island (3.8 mi), Beaux Arts Village (4.4 mi), Bryn Mawr-Skyway (4.6 mi), Bellevue (4.8 mi).
Source: U.S. Census Bureau (TIGER/Line boundaries, American Community Survey) · Data as of 12/31/2023