Marietta-Alderwood, Washington Demographics & Population 2026
During the 2020–2024 ACS period, Marietta-Alderwood, Washington had a total population of 3,754, the 228th largest community in Washington, with a median household income of $76,019, which is 23% lower than the state average. The poverty rate is 7.9%.
Data vintage: U.S. Census Bureau ACS 2020–2024 5-Year Estimates · refreshed July 2026 · Methodology & source notes
Key Takeaways
- Housing affordability is a challenge — homes cost 7.2x the median household income.
Marietta-Alderwood Quick Facts
How Marietta-Alderwood 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 | 3,569 | 3,754 | +5.2% |
| Median household income | $62,243 | $76,019 | +22.1% |
| Median home value | $493,200 | $547,100 | +10.9% |
How Marietta-Alderwood 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 less diverse community where one racial or ethnic group represents a large majority.
State average: 56 | National average: 61
Education
Educational Attainment (Adults 25+)
Marietta-Alderwood Rankings in Washington
Explore Washington Rankings
Other Cities in Whatcom County
| City | Population | Median Income | Poverty | Home Value |
|---|---|---|---|---|
| Bellingham | 93,438 | $66,755 | 18.6% | $627,500 |
| Lynden | 16,234 | $103,233 | 7.2% | $596,600 |
| Ferndale | 15,999 | $87,579 | 12.8% | $549,300 |
| Birch Bay | 10,837 | $86,854 | 9.4% | $477,200 |
| Blaine | 6,100 | $84,030 | 13.1% | $549,600 |
| Sudden Valley | 6,084 | $100,930 | 7.6% | $489,200 |
| Everson | 3,040 | $80,250 | 5.5% | $450,300 |
| Peaceful Valley | 2,858 | $59,625 | 17.1% | $317,800 |
| Geneva | 2,073 | $142,188 | 1.8% | $801,100 |
| Nooksack | 1,794 | $97,159 | 14.7% | $524,300 |
Cities Similar to Marietta-Alderwood
These cities in the same state have comparable population and economic profiles.
| City | Population | Median Income | Home Value | Bachelor's+ | Poverty |
|---|---|---|---|---|---|
| Canyon Creek | 3,910 | $77,604 | $446,300 | 18.9% | 19.1% |
| Port Hadlock-Irondale | 3,884 | $83,548 | $351,600 | 24.7% | 14.8% |
| Granger | 3,705 | $66,250 | $210,200 | 11.1% | 23.3% |
| Elma | 3,483 | $78,086 | $409,600 | 21.3% | 24.9% |
| Benton City | 3,695 | $63,542 | $355,200 | 10.5% | 11.3% |
Population Overview
Marietta-Alderwood is a small community located in Washington, within Whatcom County. The total population is 3,754. It ranks as the 228th most populous out of 628 Census-designated places in Washington.
Age Demographics
The median age in Marietta-Alderwood is 38.3 years. This is about the same as the state median of 38.3 years. 10.1% of residents are 75 or older, suggesting a significant retirement-age population with implications for healthcare services and senior housing.
Economy, Income & Housing
The median household income in Marietta-Alderwood is $76,019. This is 23% lower than the state median of $98,141. It is also 6% lower than the national median of $80,734. The poverty rate stands at 7.9%. This is 21% lower than the state poverty rate of 9.9%. The unemployment rate is 2.6%. This is 49% lower than the state rate of 5.1%. The median home value is $547,100. Housing costs are 3% lower than the state median of $564,600. The home-value-to-income ratio of 7.2x suggests that housing affordability is a significant concern for many residents. 57.6% of occupied housing units are owner-occupied. This homeownership rate is 10% lower than the state average of 63.8%.
Race & Ethnicity
The largest racial or ethnic group in Marietta-Alderwood is White (non-Hispanic), making up 76.8% of the population. Asian residents account for 6.7%. The Black or African American population (0.2%) is well below the state average of 3.9%. The Hispanic or Latino population (2.9%) is well below the state average of 14.4%.
Education
33.9% of residents aged 25 and older hold a bachelor's degree or higher. This is 14% lower 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 92.3%.
Data Sources & Methodology
All demographic data for Marietta-Alderwood, 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 Marietta-Alderwood, Washington?
Marietta-Alderwood, Washington has a population of 3,754 according to the most recent U.S. Census ACS 5-Year Estimates.
What is the median household income in Marietta-Alderwood, WA?
The median household income in Marietta-Alderwood is $76,019, which is 6% lower than the national median of $80,734.
What is the poverty rate in Marietta-Alderwood, WA?
The poverty rate in Marietta-Alderwood is 7.9%. This means approximately 295 residents live below the federal poverty line.
What is the racial makeup of Marietta-Alderwood, Washington?
Marietta-Alderwood's population is 76.8% White, 0.2% Black, 2.9% Hispanic/Latino, and 6.7% Asian.
What is the median home value in Marietta-Alderwood, WA?
The median home value in Marietta-Alderwood is $547,100. The home-value-to-income ratio is 7.2x.
How educated is Marietta-Alderwood, Washington?
33.9% of adults (25+) in Marietta-Alderwood hold a bachelor's degree or higher, and 9.1% hold a graduate or professional degree.