Mountlake Terrace city, Washington Demographics & Population 2026
As of 2026, Mountlake Terrace city, Washington has a total population of 21,419, the 66th largest city in Washington, with a median household income of $101,404, which is 7% higher than the state average. The poverty rate is 8.0%.
Mountlake Terrace city Quick Facts
How Mountlake Terrace city Compares
Median Household Income
Median Home Value
Economy & Housing
Household Income Distribution
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: 55 | National average: 60
Education
Educational Attainment (Adults 25+)
Mountlake Terrace city Rankings in Washington
Explore Washington Rankings
Cities Similar to Mountlake Terrace city
These cities in the same state have comparable population and economic profiles.
| City | Population | Median Income | Home Value | Bachelor's+ | Poverty |
|---|---|---|---|---|---|
| Five Corners CDP | 21,444 | $102,423 | $432,800 | 24.6% | 8.4% |
| Battle Ground city | 21,293 | $100,185 | $452,000 | 24.5% | 6.7% |
| Silverdale CDP | 21,046 | $101,445 | $507,600 | 35.7% | 7.2% |
| Salmon Creek CDP | 19,594 | $100,534 | $497,000 | 36.0% | 6.9% |
| Mukilteo city | 21,312 | $122,612 | $830,000 | 54.8% | 5.8% |
Population Overview
Mountlake Terrace city is a small city located in Washington. The total population is 21,419. It ranks as the 66th most populous out of 631 cities and towns in Washington.
Age Demographics
The median age in Mountlake Terrace city is 38.2 years. This is about average than the state median of 38.2 years.
Economy, Income & Housing
The median household income in Mountlake Terrace city is $101,404. This is 7% higher than the state median of $94,952. Compared to the national median of $78,538, household income here is 29% higher. The poverty rate stands at 8.0%. This is 19% lower than the state poverty rate of 9.9%. The unemployment rate is 4.9%. This is 1% lower than the state rate of 5.0%. The median home value is $606,100. Housing costs are 17% higher than the state median of $519,800. The home-value-to-income ratio is 6.0x. 56.1% of occupied housing units are owner-occupied. This homeownership rate is 12% lower than the state average of 63.9%.
Race & Ethnicity
The largest racial or ethnic group in Mountlake Terrace city is White (non-Hispanic), making up 60.7% of the population. Hispanic or Latino residents account for 17.2%.
Education
41.9% of residents aged 25 and older hold a bachelor's degree or higher. This is 8% higher than the state rate of 38.8%. Nationally, 35.0% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 93.9%.
Data Sources & Methodology
All demographic data for Mountlake Terrace city, Washington is sourced from the U.S. Census Bureau's American Community Survey (ACS) 5-Year Estimates (2019-2023). The ACS collects data from approximately 3.5 million households annually, providing reliable estimates for communities of all sizes. Comparisons are made against Washington state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 631 Census-designated places in Washington. For official data, visit data.census.gov.
Free data download: Get all Washington city and county demographics as CSV. Download Cities CSV | Download Counties CSV
Frequently Asked Questions
What is the population of Mountlake Terrace city, Washington?
Mountlake Terrace city, Washington has a population of 21,419 according to the most recent U.S. Census ACS 5-Year Estimates.
What is the median household income in Mountlake Terrace city, WA?
The median household income in Mountlake Terrace city is $101,404, which is 29% higher the national median of $78,538.
What is the poverty rate in Mountlake Terrace city, WA?
The poverty rate in Mountlake Terrace city is 8.0%. This means approximately 1,702 residents live below the federal poverty line.
What is the racial makeup of Mountlake Terrace city, Washington?
Mountlake Terrace city's population is 60.7% White, 3.6% Black, 17.2% Hispanic/Latino, and 10.3% Asian.
What is the median home value in Mountlake Terrace city, WA?
The median home value in Mountlake Terrace city is $606,100. The home-value-to-income ratio is 6.0x.
How educated is Mountlake Terrace city, Washington?
41.9% of adults (25+) in Mountlake Terrace city hold a bachelor's degree or higher, and 14.8% hold a graduate or professional degree.