Newcastle, Washington Demographics & Population 2026
During the 2020–2024 ACS period, Newcastle, Washington had a total population of 12,989, the 104th largest city in Washington, with a median household income of $160,278, which is 63% higher than the state average. The poverty rate is 5.9%.
Data vintage: U.S. Census Bureau ACS 2020–2024 5-Year Estimates · refreshed July 2026 · Methodology & source notes
Key Takeaways
- Household income is 63% above the state average — one of the wealthiest communities in Washington.
- 68.5% of adults hold a bachelor's degree or higher — top 10% in Washington.
- Housing affordability is a challenge — homes cost 7.5x the median household income.
Newcastle Quick Facts
How Newcastle Changed
Change from the 2019–2023 ACS period to 2020–2024. These are rolling five-year estimates, not year-over-year measurements.
| Metric | 2019–2023 | 2020–2024 | Change |
|---|---|---|---|
| Population | 12,945 | 12,989 | +0.3% |
| Median household income | $162,646 | $160,278 | -1.5% |
| Median home value | $1,128,200 | $1,205,600 | +6.9% |
How Newcastle Compares
Median Household Income
Median Home Value
Economy & Housing
Household Income Distribution
Detailed income brackets
Employment
Housing Overview
People & Demographics
Age Distribution
Race & Ethnicity
Diversity Index
A diverse community with significant representation from multiple racial and ethnic groups.
State average: 56 | National average: 61
Education
Educational Attainment (Adults 25+)
Newcastle Rankings in Washington
Explore Washington Rankings
Other Cities in King County
| City | Population | Median Income | Poverty | Home Value |
|---|---|---|---|---|
| Seattle | 754,195 | $123,860 | 9.9% | $938,600 |
| Bellevue | 151,847 | $165,576 | 7.2% | $1,340,300 |
| Kent | 135,603 | $92,302 | 10.8% | $587,800 |
| Renton | 105,317 | $100,432 | 8.1% | $672,600 |
| Federal Way | 99,493 | $86,909 | 13.0% | $552,800 |
| Kirkland | 92,621 | $150,414 | 6.1% | $1,115,400 |
| Auburn | 85,676 | $97,884 | 8.9% | $547,900 |
| Redmond | 77,353 | $162,560 | 5.6% | $1,167,800 |
| Sammamish | 66,463 | $239,690 | 4.3% | $1,407,300 |
| Shoreline | 61,431 | $112,751 | 8.8% | $811,100 |
Cities Similar to Newcastle
These cities in the same state have comparable population and economic profiles.
| City | Population | Median Income | Home Value | Bachelor's+ | Poverty |
|---|---|---|---|---|---|
| Lake Forest Park | 13,335 | $159,904 | $953,200 | 66.0% | 4.0% |
| Woodinville | 13,438 | $164,398 | $1,100,100 | 70.4% | 2.9% |
| Lake Tapps | 12,798 | $148,005 | $742,400 | 42.1% | 4.6% |
| East Renton Highlands | 12,582 | $142,500 | $778,700 | 43.3% | 3.1% |
| Artondale | 14,073 | $149,302 | $734,400 | 55.4% | 2.0% |
Population Overview
Newcastle is a small city located in Washington, within King County. The total population is 12,989. It ranks as the 104th most populous out of 628 Census-designated places in Washington.
Age Demographics
The median age in Newcastle is 37.5 years. This is 2% lower than the state median of 38.3 years.
Economy, Income & Housing
The median household income in Newcastle is $160,278. This is 63% higher than the state median of $98,141. It is also 99% higher than the national median of $80,734. The poverty rate stands at 5.9%. This is 40% lower than the state poverty rate of 9.9%. The unemployment rate is 5.6%. This is 10% higher than the state rate of 5.1%. The median home value is $1,205,600. Housing costs are 114% higher than the state median of $564,600. The home-value-to-income ratio of 7.5x suggests that housing affordability is a significant concern for many residents. 61.0% of occupied housing units are owner-occupied. This homeownership rate is 4% lower than the state average of 63.8%.
Race & Ethnicity
Newcastle is a highly diverse community where no single racial or ethnic group constitutes a majority of the population. White (non-Hispanic) residents account for 37.6%. The Hispanic or Latino population (4.5%) is well below the state average of 14.4%. The Asian population is significantly higher than the state average (42.0% vs 9.7%).
Education
68.5% of residents aged 25 and older hold a bachelor's degree or higher. This places Newcastle in the top 10% of all cities in the state for educational attainment. This is 73% higher than the state rate of 39.6%. Nationally, 35.7% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 97.5%. Notably, 29.7% of adults hold a graduate or professional degree, indicating a highly educated workforce.
Data Sources & Methodology
All demographic data for Newcastle, Washington is sourced from the U.S. Census Bureau's American Community Survey (ACS) 2020–2024 5-Year Estimates. The ACS collects data from approximately 3.5 million households annually and pools five years of responses so that even small communities can be measured, though the margin of error widens as the population falls. Comparisons are made against Washington state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 628 Census-designated places in Washington. Read more about how these figures are produced on our methodology page, or visit data.census.gov for official data.
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Frequently Asked Questions
What is the population of Newcastle, Washington?
Newcastle, Washington has a population of 12,989 according to the most recent U.S. Census ACS 5-Year Estimates.
What is the median household income in Newcastle, WA?
The median household income in Newcastle is $160,278, which is 99% higher than the national median of $80,734.
What is the poverty rate in Newcastle, WA?
The poverty rate in Newcastle is 5.9%. This means approximately 769 residents live below the federal poverty line.
What is the racial makeup of Newcastle, Washington?
Newcastle's population is 37.6% White, 3.5% Black, 4.5% Hispanic/Latino, and 42.0% Asian.
What is the median home value in Newcastle, WA?
The median home value in Newcastle is $1,205,600. The home-value-to-income ratio is 7.5x.
How educated is Newcastle, Washington?
68.5% of adults (25+) in Newcastle hold a bachelor's degree or higher, and 29.7% hold a graduate or professional degree.