Mountlake Terrace Population

1960–2026

26,380

2026 projection

23.9% since 2020 (increase)

05K10K15K20K25K30K1960197019801990200020102020

Source: U.S. Census Bureau decennial counts and annual estimates. 2026 is a projection. Values between recorded years are interpolated.

Use the left and right arrow keys to inspect population observations.

Population by year

Population estimates for Mountlake Terrace. Annual change is shown as a percentage. Growth is the total change since the preceding observation.
202626,380+9503.74%
202525,430+3431.37%
202425,087+1,3855.84%
202323,702+8473.71%
202222,855+5312.38%
202122,324+1,0404.89%
202021,284-660.31%
201921,350-480.22%
201821,398+230.11%
201721,375+2321.10%

Showing 10 of 22 years.

Mountlake Terrace Demographics

38.3median age

Median age

Female39.5 yrs
Male37.2 yrs

Adults

19,185
3,810 seniors · 20%15,375 other adults

Sex

Female 50.5% · 11,678Male 49.5% · 11,426

Population by age

MaleFemale85+ years, male: 18185+ years, female: 39180–84 years, male: 21480–84 years, female: 22175–79 years, male: 27975–79 years, female: 35970–74 years, male: 37670–74 years, female: 53365–69 years, male: 68265–69 years, female: 57460–64 years, male: 67360–64 years, female: 97155–59 years, male: 55255–59 years, female: 71350–54 years, male: 72650–54 years, female: 50445–49 years, male: 59145–49 years, female: 75340–44 years, male: 86040–44 years, female: 75135–39 years, male: 1,20735–39 years, female: 1,03130–34 years, male: 1,09930–34 years, female: 1,22425–29 years, male: 1,00025–29 years, female: 1,09820–24 years, male: 57920–24 years, female: 56715–19 years, male: 54415–19 years, female: 49610–14 years, male: 78410–14 years, female: 4615–9 years, male: 6285–9 years, female: 5380–4 years, male: 4510–4 years, female: 49385+80–8475–7970–7465–6960–6455–5950–5445–4940–4435–3930–3425–2920–2415–1910–145–90–45005001K1K

Hover or tap an age group to see exact counts. Use the up and down arrow keys to inspect age groups.

U.S. Census Bureau, 2024 ACS 5-year estimates · Table S0101

Race and ethnicity

Tap a square or a group below to highlight it.

Each square is about 1% of residents (roughly 231 people).

Hispanic or Latino residents can be of any race. All other groups exclude Hispanic residents.

U.S. Census Bureau, 2024 ACS 5-year estimates · Table B03002

Mountlake Terrace Income

$107,687median household income

Median household income

$107,687

Half of households earn more, half earn less

Median earnings

$66,046

Typical yearly pay for a worker 25 or older.

Poverty rate

7%

About 1 in 14 residents

U.S. Census Bureau, 2024 ACS 5-year estimates · Tables S1901, S1501, S1701

Mountlake Terrace Marital Status

46% of residents age 15 and older are married.

MarriedNever married
Overall
Male
Female
Marital status of residents age 15 and older
StatusOverallMaleFemale
Married46%49%42%
Never married35%40%32%
Divorced12%8%15%
Widowed6%2%9%
Separated2%<1%2%

U.S. Census Bureau, 2024 ACS 5-year estimates · Table S1201

Sources

10 sources, all from the U.S. Census Bureau

Population

American Community Survey, 2024 5-year