† Citizen voting-age population estimated for prior cycles; 2004 predates the ACS and is extrapolated. Source: ACS 5-year, table B05003.
——
D+60R+60
20042024
Boundary by 2024 margin · Precinct returns · VEST · MIT Election Lab
People and households
Who lives here
Exact values for this place, its state, and the United States.
Race · ethnicity · ancestry
Communities and origins
GroupSammamishWashingtonUnited States
German11.5%14.5%12.5%
English10.6%12.1%9.5%
Irish8.3%9.8%9.4%
Italian3.3%3.1%4.8%
Norwegian3.3%4.0%—
American2.4%3.8%5.3%
Swedish2.3%1.8%—
Scottish2.2%2.6%1.3%
Chinese10.3%2.2%1.3%
Asian Indian9.1%2.0%1.4%
Filipino4.2%1.5%0.9%
Vietnamese4.0%1.1%0.6%
Korean2.9%0.9%0.4%
Japanese1.6%0.4%0.2%
Taiwanese0.7%——
Cambodian0.5%0.3%—
Mexican3.6%10.8%11.3%
Salvadoran0.3%0.4%0.7%
Puerto Rican0.2%0.5%1.8%
Spaniard0.2%0.4%—
Guatemalan0.2%0.2%0.5%
Honduran0.2%—0.3%
Colombian0.2%0.2%0.4%
Spanish0.2%0.3%—
African American†0.7%2.3%9.9%
Ethiopian0.2%0.3%—
Samoan0.2%0.2%—
Hispanic or Latino counts residents of any race; the race groups count only their non-Hispanic residents, so the groups are mutually exclusive and sum to 100%. Expand a row to see ancestries reported within that group.
Age and life stage
Measure
Sammamish
Washington
United States
Median age
39.9
38.5
39.1
Age 18–24
6.1%
8.5%
9.2%
Age 65 and older
9.1%
16.7%
17.2%
Household economy
Measure
Sammamish
Washington
United States
Median household income
$239,690
$98,141
$84,427
Poverty rate
4.3%
9.9%
12.5%
Bachelor's degree or higher (25+)
77.1%
39.3%
35.6%
Languages at home
Measure
Sammamish
Washington
United States
Speaks a non-English language at home
39.2%
21.5%
22.3%
Spanish
3.3%
9.1%
13.6%
Other Indo-European
9.4%
2.1%
2.0%
Chinese (incl. Mandarin & Cantonese)
10.3%
1.9%
1.1%
Other Asian & Pacific Island
9.1%
2.1%
1.1%
Religious landscape
Measure
Sammamish
Washington
United States
Catholic
—
10.7%
18.6%
Evangelical Protestant
—
20.5%
16.5%
Unclaimed / not counted
—
58.8%
51.5%
American Community Survey 2024 5-year (CVAP, income, age, poverty, education, language, race, ancestry) · presidential returns from MIT Election Lab through 2024 · 2020 U.S. Religion Census (ASARB) — congregational adherents; unclaimed is the residual not counted by congregations.
Sammamish, Washington
presidential history
Presidential margin, 2004–2024
Democratic minus Republican, by election
Presidential margin over time
Year
Margin (D minus R)
2004
+8.9%
2008
+21.3%
2012
+13.3%
2016
+38.2%
2020
+44.6%
2024
+43.2%
DemocraticRepublican
6 presidential elections
Third column names the leading third-party or independent finisher. Source · MIT Election Lab · ICPSR · VEST (precinct-level 2024). Swing · margin change from the prior cycle. vs U.S. · margin relative to the national result that year. Third-party votes in 2012 are allocated from certified county totals by this place's share of each county's two-party vote — that cycle's precinct source records two-party splits. † 2004 sub-county results are estimated: the source's block-level detail for this cycle was unreliable — either county/municipality-level consolidated reporting (COVID-era) or a precinct-to-block allocation that misplaced votes — so the figures are allocated from the constituent county totals in proportion to the place and scaled to certified totals.
Year
Won
Democratic
Republican
Other
Margin
Swing
vs U.S.
Total
D
69.2%Harris23,067
26.0%Trump8,670
4.8%
D+43.2
R+1.4
D+44.6
33,350
D
70.8%Biden25,119
26.3%Trump9,317
2.9%
D+44.6
D+6.4
D+40.1
35,467
D
65.9%Clinton19,470
27.7%Trump8,194
6.4%
D+38.2
D+24.9
D+36.1
29,542
D
55.2%Obama13,771
41.9%Romney10,457
2.9%
D+13.3
R+8.0
D+9.4
24,955
D
60.1%Obama17,248
38.8%McCain11,134
1.1%
D+21.3
D+12.4
D+14.0
28,698
D
54.0%Kerry15,438
45.1%Bush12,903
0.9%
D+8.9
—
D+11.3
28,598
Sammamish has transformed from a small plateau community into one of the state's most educated and affluent cities, driven by tech-sector migration from nearby Redmond and Bellevue. Its rapid growth has shifted voting patterns noticeably over the past decade.
Across the recorded series it reached a Democratic high of 44.6 points in 2020. Between 2020 and 2024 the city moved 1.4 points toward the Republican candidate; the 2024 margin was 43.2 points.
A population of 66,463, a 51% non-Hispanic-white share, and a median household income of $239,690 describe the city. The city's voting pattern over the last decade is most similar to that of Union Hill-Novelty Hill and Los Altos.
Akashic
Political twins — cities
The cities whose fingerprint — 2000–2024 trajectory, demographics, ancestry, religion — sits closest to this one, and why.
Twin score (0–100) = weighted cosine between tier-standardized fingerprints: presidential margins 2000–2024 with 12-yr trend and elasticity, ACS income, age, education, population and race, top reported ancestries, and religious adherence — chips name the closest-shared dimensions and the widest gap. Re-weight the groups in the twins explorer.
In 2024, Sammamish, Washington voted Democratic by 43.2 points (D+43.2), carried by the Democratic candidate. Out of 33,350 votes cast, 23,067 went Democratic and 8,670 went Republican.
How many people live in Sammamish, Washington?
Sammamish, Washington has a population of 66,463 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Sammamish, Washington?
Median household income in Sammamish, Washington is $239,690 — above the national median of $80,734. The Washington state median is $98,141.
What is the political history of Sammamish, Washington?
Akashic tracks 6 presidential elections in Sammamish, Washington from 2004 to 2024. Of those, 6 went Democratic and 0 went Republican.
