Sammamish Population

2000–2026

65,717

2026 projection

2.6% since 2020 (decrease)

010K20K30K40K50K60K70K200020052010201520202025

Source: U.S. Census Bureau decennial counts and annual estimates, including 2010–2020 intercensal 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 Sammamish. Annual change is shown as a percentage. Growth is the total change since the preceding observation.
202665,717-3930.59%
202566,110+2310.35%
202465,879+3860.59%
202365,493-3320.50%
202265,825-7641.15%
202166,589-8661.28%
202067,455+2360.35%
201967,219+4430.66%
201866,776+6851.04%
201766,091+1,2521.93%

Showing 10 of 18 years.

The 2020 row compares the April 1 Census count with the July 1, 2019 estimate (about nine months). Its Growth and Annual change therefore do not represent a full year.

Growth since 2020, compared

Sammamish has a population change lower than King County, Washington, and the U.S.

  • Washington+3.5%
  • King County+3.1%
  • United States+3.1%
  • Sammamish−2.0%

Change from July 1, 2020 to July 1, 2025 population estimates—not annualized growth or site projections.

Source: U.S. Census Bureau. U.S. totals are summed from the 50 states and D.C.; unavailable comparisons are omitted.

Sammamish Demographics

39.9median age

Median age

Female39.3 yrs
Male40.4 yrs

Adults

47,432
6,048 seniors (65+) · 13% of adults41,384 other adults

Sex

Female 51% · 33,902Male 49% · 32,561

Population by age

MaleFemale85+ years, male: 23185+ years, female: 26280–84 years, male: 26180–84 years, female: 32075–79 years, male: 38075–79 years, female: 39470–74 years, male: 92570–74 years, female: 85965–69 years, male: 1,09265–69 years, female: 1,32460–64 years, male: 1,86660–64 years, female: 1,66755–59 years, male: 2,26555–59 years, female: 2,11650–54 years, male: 3,35850–54 years, female: 2,93445–49 years, male: 2,99645–49 years, female: 3,46340–44 years, male: 3,25540–44 years, female: 3,07935–39 years, male: 2,34635–39 years, female: 2,97630–34 years, male: 1,39130–34 years, female: 1,84425–29 years, male: 81325–29 years, female: 99520–24 years, male: 1,32820–24 years, female: 1,21815–19 years, male: 2,38715–19 years, female: 3,17110–14 years, male: 3,10910–14 years, female: 3,2335–9 years, male: 2,9295–9 years, female: 2,2280–4 years, male: 1,6290–4 years, female: 1,81985+80–8475–7970–7465–6960–6455–5950–5445–4940–4435–3930–3425–2920–2415–1910–145–90–41K1K2K2K3K3K

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 665 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

Sammamish Income

$239,690median household income

Median household income

$239,690

Half of households earn more, half earn less

Median earnings

$137,394

Typical yearly pay for a worker 25 or older.

Poverty rate

4.3%

About 1 in 23 residents

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

Sammamish Marital Status

70% of residents age 15 and older are married.

MarriedNever married
Overall
Male
Female
Marital status of residents age 15 and older
StatusOverallMaleFemale
Married70%74%66%
Never married23%22%24%
Divorced4%3%6%
Widowed2%1%3%
Separated<1%<1%<1%

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

Sources

14 sources

Population

American Community Survey, 2024 5-year

Additional sources