Seattle Authority

Seattle is a high-income mid-sized city of 754,195 with home prices 1.7× the Washington median.

Also known as: Seattle Metro Authority

Seattle is, by most measures, a large city that has spent considerable energy thinking of itself as a particular kind of place — a Pacific Northwest city, a port city, a city of hills and water — and the federal data largely confirms that the self-image is not entirely invented. With a population of 754,195 according to Census ACS 5-Year 2024 estimates, it is the largest city in Washington State and the anchor of King County, sitting at a median age of 35.6 years in a region where the weather is mild enough, and the economy active enough, that people tend to stay.

Population and Demographics

The Census ACS 5-Year 2024 data places Seattle's total population at 754,195, distributed across 353,019 households, of which 150,981 are family households. The age distribution leans toward working adults: the 18-to-34 cohort accounts for 264,510 residents, and the 35-to-64 group adds another substantial share, while children under 18 number 103,823, representing 13.8 percent of the population. The median age of 35.6 reflects a city that is neither particularly young nor particularly old — a characteristic common to cities with large university populations and established professional sectors.

Racial and ethnic composition, per Census ACS 5-Year 2023, includes 458,479 white residents, 127,280 Asian residents, 60,740 Hispanic or Latino residents, and 48,945 Black residents, among others.

Housing and Affordability

The relationship between Seattle's housing costs and its residents' incomes is one of those situations where the numbers are precise and the implications are uncomfortable. According to data derived from Census income, housing, and poverty figures, the home-price-to-income ratio stands at 7.6, a figure that places Seattle in the "very expensive" category for home purchase. Rent, by contrast, consumes approximately 19.4 percent of median income, which the same source characterizes as "affordable" — a distinction that reflects how differently the rental and ownership markets behave in the same city, at the same moment.

Median household income, per entity facts, is $121,984, a figure that sounds substantial until it is placed alongside a home-price-to-income ratio of 7.6.

Climate and Air Quality

The NOAA ACIS station at Seattle Boeing Field, located 3.5 miles from the city center, records an average temperature of 54.4 degrees Fahrenheit and annual precipitation of 28.4 inches. The precipitation figure is, incidentally, lower than many cities that do not carry Seattle's reputation for rain — the city's climate is characterized more by persistent overcast and drizzle than by heavy rainfall events.

Air quality in 2024 was, by EPA AQI Annual Summary standards, generally good. Of 366 measured days, 255 were classified as good, 108 as moderate, and 3 as unhealthy for sensitive groups. No days were recorded as unhealthy for the general population, very unhealthy, or hazardous. The maximum AQI recorded was 119, which falls in the moderate range.

Broadband Infrastructure

According to FCC Broadband Data Collection figures as of June 2025, Seattle's broadband coverage is, for a city of its size, remarkably complete. All 397,537 housing units in the dataset have access to service at 25/3 Mbps or faster, and the same proportion have access at 100/20 Mbps. Coverage at 250/25 Mbps reaches 99.9987 percent of units, and gigabit-level service at 1000/100 Mbps is available to 95.49 percent of units. These figures place Seattle among the most thoroughly served large cities in the country by this measure.

Education

The University of Washington-Seattle Campus is the most prominent institution in the city's higher education landscape. According to the College Scorecard, it enrolls 31,942 students, charges in-state tuition of $12,973 and out-of-state tuition of $43,209, and admits approximately 39.15 percent of applicants. The NCES IPEDS 2022 data identifies 16 colleges and universities operating within the city.

Childcare infrastructure, per state licensing records, includes 240 licensed childcare centers operating across the city.

Civic and Community Organizations

The IRS Exempt Organizations Business Master File identifies 335 churches operating in Seattle, along with 81 arts organizations and 15 civic service organizations. Animal welfare is represented by three registered rescue organizations: Emerald City Pet Rescue, Beloveds Animal Rescue Relief Foundation, and Gertrudes Animal Rescue.

The chamber of commerce presence in the IRS registry is, in this case, a specific one: the Polish American Chamber of Commerce Pacific Northwest holds the relevant designation, per IRS EO BMF records.

Municipal Governance and Legal Framework

Seattle operates as a first-class city under Washington State law. The statutory framework governing Washington cities and towns, as described in the ANA knowledge corpus, distinguishes among first-class cities under RCW ch. 35.22, second-class cities under RCW ch. 35.23, and towns under RCW ch. 35.27. First-class cities, which Seattle has been since the late nineteenth century, have the broadest home-rule authority under this classification system. Incorporation authority derives from Wash. Const. Art. XI § 10 and RCW ch. 35.02, and annexation is governed by RCW ch. 35.13.

The Seattle Municipal Code is maintained and published through Municode and is accessible at https://library.municode.com/wa/seattle. The corpus notes that Washington cities may adopt codes by reference under RCW 35.21.180, and may codify ordinances under RCW 35.21.500 through 35.21.570 — a practical mechanism that allows a city the size of Seattle to incorporate technical standards without reproducing them in full.

Traffic regulation in Washington cities operates through a model ordinance framework: the Washington Model Traffic Ordinance, codified at Chapter 308-330 of the Washington Administrative Code, is available for adoption by reference, as noted in the corpus excerpt from municipal code records.

Banking

The FDIC Institutions and Branches database identifies multiple bank branches operating in Seattle. Among them, Beneficial State Bank maintains a Seattle Branch at 1501 E Madison St (ZIP 98122), and Seattle Bank operates a Rainier Square Branch at 401 Union Street, among other locations documented in the FDIC records.

Further Reading

• U.S. Census Bureau, American Community Survey 5-Year Estimates — https://data.census.gov
• National Center for Education Statistics, Common Core of Data — https://nces.ed.gov/ccd/
• City of Seattle, Seattle Municipal Code (via Municode) — https://library.municode.com/wa/seattle