ZIP Code Tabulation Area · Washington

ZIP Code 98178: Bryn Mawr-Skyway, WA

ZIP Code 98178 (Bryn Mawr-Skyway, King County, Washington) has an estimated 26,748 residents in 9,349 households. The median household income is $99,505, the median home value is $660,400 and the median gross rent is $1,869/mo. Figures are U.S. Census Bureau American Community Survey 2020–2024 5-year estimates for the matching ZIP Code Tabulation Area.

American Community Survey 2020–2024 5-year estimates · Updated

Total population

26,748

Margin of error ±2,027

Median household income

$99,505

Margin of error ±$9,722

Median home value

$660,400

Margin of error ±$24,292

Median gross rent

$1,869/mo

Margin of error ±$204

Median age

39.7 yrs

Margin of error ±1.6 yrs

Mean travel time to work

30.6 min

Margin of error ±4.4 min

How ZIP 98178 compares with Washington and the U.S.

State and national figures are the Census Bureau's own estimates for those areas from the same ACS release, not averages of ZIP codes.

Median age

ZIP 9817839.7 yrsWashington38.3 yrsUnited States38.9 yrs

Median household income

ZIP 98178$99,505Washington$98,141United States$80,734

Per capita income

ZIP 98178$49,953Washington$53,744United States$44,673

Poverty rate

ZIP 981789.9%Washington9.9%United States12.5%

Unemployment rate

ZIP 981786.1%Washington5.1%United States5.2%

Bachelor's degree or higher

ZIP 9817836.1%Washington39.6%United States35.7%

Median home value

ZIP 98178$660,400Washington$564,600United States$332,700

Median gross rent

ZIP 98178$1,869/moWashington$1,760/moUnited States$1,413/mo

Owner-occupied homes

ZIP 9817866.7%Washington63.8%United States65.2%

Mean travel time to work

ZIP 9817830.6 minWashington26.6 minUnited States26.4 min

Worked from home

ZIP 9817820.1%Washington19.8%United States15.1%

All figures for ZIP 98178

Each estimate has a 90% margin of error: the true value is likely within that range. * marks estimates with a large margin of error (a coefficient of variation above 30%, or ±10 percentage points or more for rates).

ZIP 98178 — ACS 2020–2024 5-year estimates
MeasureZIP 98178Margin of errorWashingtonUnited States
Total population26,748±2,0277,816,116334,922,499
Median age39.7 yrs±1.6 yrs38.3 yrs38.9 yrs
Households9,349±5863,064,820129,227,496
Median household income$99,505±$9,722$98,141$80,734
Per capita income$49,953±$5,364$53,744$44,673
Poverty rate9.9%±2.7 pts9.9%12.5%
Unemployment rate6.1%±1.7 pts5.1%5.2%
Bachelor's degree or higher36.1%±2.2 pts39.6%35.7%
Median home value$660,400±$24,292$564,600$332,700
Median gross rent$1,869/mo±$204$1,760/mo$1,413/mo
Owner-occupied homes66.7%±3.3 pts63.8%65.2%
Mean travel time to work30.6 min±4.4 min26.6 min26.4 min
Worked from home20.1%±3.4 pts19.8%15.1%

Race and Hispanic or Latino origin

Shares of the total population by the Census Bureau's race and Hispanic or Latino origin categories (table B03002), listed in the Census Bureau's order. People self-identify on the survey.

Population by race and Hispanic or Latino origin, ZIP 98178
GroupZIP 98178WashingtonUnited States
White alone, not Hispanic or Latino28.7%63.1%57.4%
Black or African American alone, not Hispanic or Latino20.3%3.8%11.9%
American Indian and Alaska Native alone, not Hispanic or Latino0.8%0.8%0.5%
Asian alone, not Hispanic or Latino31.9%9.7%5.9%
Native Hawaiian and Other Pacific Islander alone, not Hispanic or Latino0.2%0.7%0.2%
Some other race alone, not Hispanic or Latino0.7%0.6%0.6%
Two or more races, not Hispanic or Latino8.5%6.8%4.3%
Hispanic or Latino (of any race)9.0%14.4%19.3%

Where ZIP 98178 is

State
Washington
Main county
King County
Largest overlapping place
Bryn Mawr-Skyway (58% of the ZIP's land area)
Land area
4.90 sq mi· about 5,459 people per sq mi

County and place names come from the Census Bureau's 2020 ZCTA relationship files. A ZIP code's mailing city, set by the U.S. Postal Service, can differ from these names.

Other ZIP codes in King County

98116 Seattle, WA98117 Seattle, WA98118 Seattle, WA98119 Seattle, WA98121 Seattle, WA98122 Seattle, WA98125 Seattle, WA98126 Seattle, WA98133 Shoreline, WA98134 Seattle, WA98136 Seattle, WA98144 Seattle, WA98146 Burien, WA98148 Burien, WA98155 Shoreline, WA98164 Seattle, WA98166 Burien, WA98168 Tukwila, WA98177 Shoreline, WA98188 Tukwila, WA98195 Seattle, WA98198 Des Moines, WA98199 Seattle, WA98224 King County, WA

See every ZIP code in Washington, or compare ZIP 98178 with another ZIP code.

Census figures describe residents as a group and cannot tell you about any one home or street. For a specific address, check local government and housing records.

About ZIP codes and ZCTAs: the Census Bureau publishes statistics for ZIP Code Tabulation Areas, which approximate USPS ZIP code delivery areas. Learn how they differ.

Sources

  • U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, detailed tables B01003, B01002, B11001, B19013, B19301, B17001, B23025, B15003, B25077, B25064, B25003, B08013, B08303, B08301, B03002 — snapshot Oct 26, 2026.
  • U.S. Census Bureau, 2020 ZCTA5 relationship files (county and place).
  • Data: U.S. Census Bureau, American Community Survey 5-year estimates (detailed tables) and 2020 Census ZCTA relationship files. This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau. These agencies do not endorse OpenZIP.