Mill Creek is a city of 20,956 people in Washington. Home values have roughly tripled since 2000, reaching $903,800. Since 2000 the city has more than doubled, up 9,431 people. 56% of adults hold a bachelor's degree, against 36% nationally. Few US cities rank higher on income. There are 4,512 people per square mile.
At a glance
Wealthier
median household income $124,364, above the US median
US median: $82,259
Mid-age
median age 39.3
US median: 38.9
More educated
56% hold a bachelor's degree
US average: 36%
Less affordable
home values up 67%, inflation adjusted
US median home: $376,019
Unique to this place
What stands out about Mill Creek
What changed most since 1990
Population7,172 → 20,956(+192%)US over the same years: +35%
White share91.2% → 61.3%(−30.0 pts)US over the same years: −17.8 pts
Asian share7.6% → 20.3%(+12.7 pts)US over the same years: +3.1 pts
Mill Creek's population equals 2.5% of Snohomish County's. Its number of people who work from home equals 3.9% of the county's. Its number of adults with a bachelor's degree or higher equals 3.7% of the county's.
Shares are "alone or in combination": a person with both Medicare and Medicaid counts in each, so categories overlap and do not sum to 100%.
Section 09 · Service history
Veterans
Veterans by period of service, 2024
Gulf War (2001 or later)25.3%(207)
US avg: 26.4%
Gulf War (1990s)36.8%(301)
US avg: 24.3%
Vietnam era40.4%(330)
US avg: 33.1%
Korean War1.2%(10)
US avg: 4.5%
World War II0%(0)
US avg: 1%
Share of the 817 veterans here. A veteran who served across eras counts in each, so shares can total more than 100%. Peacetime-only service is included in the total but not shown as an era.
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Over time
Mill Creek, decade by decade
Mill Creek population, inflation-adjusted income and home value, education, and diversity by year
Year
Population
Median household income
Median home value
Bachelor's degree+
Diversity score
1990
7,172
$120,603
$515,535
41.4%
20.2
2000
11,525
$126,973
$539,756
47.7%
43.4
2010
18,244
$124,380
$642,466
46.1%
58.3
2020
20,926
$127,205
$708,316
49.9%
72.0
2024
20,956
$124,364
$903,800
56.0%
71.3
Census years come from the decennial census and the latest year from the American Community Survey, so part of any change between those two rows can reflect the different surveys. Dollar figures are adjusted for inflation to 2024 dollars; a figure ending in "+" was at the Census Bureau's reporting cap that year. The diversity score runs from 0 to 100; see how it's calculated.
