Who lives in Seattle?
The age breakdown of Seattle, WA, how many residents were born in the state or outside the U.S., the languages spoken at home, and how all of it compares with the county, the state and the nation.
U.S. Census Bureau, American Community Survey 5-year estimates, tables B01001, B01002, B05002 and C16001.
This story was assembled using AI and public data sources.
The people of Seattle, by the numbers.
Median age: 35.5 yrs — U.S.: 38.7 yrs
Share of residents by age
- Under 18: 14
- 18–24: 10.1
- 25–34: 24.9
- 35–44: 16.3
- 45–54: 12.2
- 55–64: 9.8
- 65–74: 7.7
- 75+: 5.1
Born in this state: 35% — Born outside the U.S.: 19.9%
Languages spoken at home (share of residents 5+)
- Chinese: 5
- Spanish: 4.6
- Other Indo-European: 3.1
- Korean: 2.2
- Tagalog: 2.2
- French / Haitian: 0.7
Median age (years)
- Seattle: 35.5
- King County: 37.3
- WA: 38.2
- U.S.: 38.7
What it means
Half of residents here are younger than 35.5 — 3.2 years below the national median.
About 14% of residents are under 18 and 13% are 65 or older.
35% of people living here were born in WA, and 19.9% were born outside the United States (U.S.: 13.9%).
77% of residents 5 and older speak only English at home.
All shares are drawn from a population of about 741,440.
Sources
- U.S. Census Bureau — American Community Survey (ACS) 5-year estimates — Population, income, housing, education, commuting and poverty figures
- Census Bureau API — ACS Detailed Tables — The endpoint these pages are generated from
- data.census.gov — Look up the same tables for any place yourself
- ACS accuracy statement — Estimates carry margins of error; small places vary the most
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