Mill Creek, Washington Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates
The population of Mill Creek, Washington is 20,846 as of the 2023 American Community Survey, making it the 72nd-largest city in Washington. The median household income is $121,578, the median home value is $836,300, and the median age is 38.8.
The population has grown 14.9% since 2010 (18,267 → 20,993).
20,846
Population
4489
People / sq mi
$121,578
Median Income
$836,300
Median Home Value
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Mill Creek covers 4.6 sq mi of land at 4489 people per square mile.
About Mill Creek, WA
Remote work is unusually prominent in Mill Creek: 27.4% of workers primarily work from home, above the 14.0% national rate. With 20,846 residents, Mill Creek is a city in Washington.
Households take in a median $121,578, comfortably above the US median of $78,538. The poverty rate is 4.7%, below the national 12.4%. Real estate commands a premium here — a median home value of $836,300, with typical rent around $2,197.
College attainment is above the local norm at 53.7%, above the national 35.0%. An unusually large 27.4% of workers are remote, above the national 14.0%, and the average commute runs about 33 minutes each way.
The remote-work concentration is telling in Mill Creek — it skews toward higher-income, college-educated workers and reshapes both commute patterns and housing demand.
Mill Creek city Population History (2010-2024)
The city of Mill Creek city had a population of 18,267 in 2010 and 20,993 in 2024, a 14.9% growth over 14 years. The peak was 21,023 in 2021. Average annual growth rate: 1.01%.
20,993
Population (2024)
18,267
Population (2010)
21,023
Peak (2021)
1.01%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 18,267 |
| 2011 | 18,395 |
| 2012 | 18,600 |
| 2013 | 18,684 |
| 2014 | 19,068 |
| 2015 | 19,866 |
| 2016 | 20,155 |
| 2017 | 20,874 |
| 2018 | 20,977 |
| 2019 | 20,897 |
| 2020 | 20,912 |
| 2021 | 21,023 |
| 2022 | 20,938 |
| 2023 | 20,933 |
| 2024 | 20,993 |
Race & Ethnicity
| White | 64.0% |
| Black or African American | 4.6% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 1.1% |
| Two or More Races | 0.0% |
Economy & Income
$121,578
Median Household Income
$63,591
Per Capita Income
4.7%
Poverty Rate
3.1%
Unemployment Rate
Housing
$836,300
Median Home Value
$2,197
Median Rent
59.8%
Owner-Occupied
Education
96.3%
High School+
53.7%
Bachelor's+
Commute
4.8%
Drive Alone
57.8%
Public Transit
27.4%
Work From Home
32.9 min
Avg Commute
Community Profile
28.6%
Foreign Born
73.7%
Non-English at Home
4.9%
Veterans
9.6%
With Disability
97.0%
Health Insurance
98.2%
Internet Access
Employment by Industry
| Finance, Insurance & Real Estate | 22.4% |
| Professional, Scientific & Management | 20.1% |
| Manufacturing | 12.1% |
| Education, Health Care & Social Services | 8.0% |
| Information | 6.5% |
| Transportation & Warehousing | 3.5% |
| Public Administration | 3.4% |
| Construction | 3.3% |
| Retail Trade | 3.2% |
| Arts, Entertainment & Food Services | 3.0% |
| Agriculture & Mining | 0.3% |
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City rankings
Frequently Asked Questions
Mill Creek, Washington has a population of 20,846 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 72nd-largest city in Washington.
The median household income in Mill Creek, Washington is $121,578, with 4.7% of residents living below the federal poverty level.
The median home value in Mill Creek, Washington is $836,300, with median monthly rent at $2,197 and a homeownership rate of 59.8%.
The median age in Mill Creek, Washington is 38.8 years. The population is 49.4% male and 50.6% female.
The population has grown 14.9% since 2010 (18,267 → 20,993).
Where to stay in Mill Creek
Visiting or relocating to Mill Creek, WA? Compare hotels and short-term rentals across the metro — live availability and prices.
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Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.