Seattle, WA 98178 ZIP Code Profile

Related Place Profiles:
Bryn Mawr, WA | Seattle, WA | Skyway, WA | Tukwila, WA

ZIP Code 98178: Basic Data & USPS Preferred City Name

Preferred Name, USPS
Seattle, WA 98178

Acceptable Alternative
Tukwila, WA 98178

Not Acceptable, USPS
Bryn Mawr, WA 98178
Skyway, WA 98178

  • ZIP Code Type: STANDARD
  • County: King County
  • Centroid: Latitude 47.493, Longitude -122.25
  • Time Zone: Pacific Time Zone (UTC -8 hours)
  • Observes DST: Yes
  • Businesses Addresses: 243
  • PO Box Addresses: 260
  • Residential Addresses: 9,314
    • Multi-Family Addresses: 1,857
    • Single Family Addresses: 7,457

The ZIP Code maps and database are updated 4 times per year.
Database updated: May 1, 2018, Maps updated: February 1, 2018.

EXTREMELY LOCAL Demographic Data

Address Based Hyperlocal Data Input an address and get data & demographics for the pertinent census block group (CBG), a searchable map and a customized directory. The CBG is the smallest geographical unit used by the Census Bureau for reporting demographic data.


98178 ZIP Code Map

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Seattle, WA 98178 Data & Demographics (As of July 1, 2017)


Total Population 26,651
Daytime Population: Workers 3,442
Daytime Population: Residents 13,641
Total Daytime Population (TDP) 17,083
Ratio TDP/Total Population1 0.64
Population in Households 26,496
Population in Familes 20,992
Population in Group Qrtrs 155
Population Density2 5,199
Diversity Index3 79


Median Household Income $62,164
Average Household Income $78,543
Per Capita Income $27,860


Total Housing Units 9,918 (100%)
Owner Occupied HU 5,899 (59.5%)
Renter Occupied HU 3,487 (35.2%)
Vacant Housing Units 532 ( 5.4%)
Median Home Value $335,565
Average Home Value $389,146


Total Households 9,386
Average Household Size 2.82
Family Households 6,146
Average Family Size 3
  1. If the ratio of the TDP to Total Population is greater than 1, the location gains population during the day when commuting workers are present. If the ratio is less than 1, the location is more of a bedroom community where people commute to another place for work.
  2. Population Density = Total Population per square mile.
  3. The Diversity Index is a scale of 0 to 100 that represents the likelihood that two persons, chosen at random from the same area, belong to different race or ethnic groups. If an area's entire population belongs to one race AND one ethnic group, then the area has zero diversity. An area's diversity index increases to 100 when the population is evenly divided into two or more race/ethnic groups.


2010-2017 2017-2022
Population 1.26% 1.24%
Households 0.98% 1.11%
Families 1.03% 1.11%
Median Household Income   3.01%
Per Capita Income   2.56%

Seattle, WA 98178 - Peer Comparisons by Rank and Percentile

The table below compares 98178 to the other 585 ZIP Codes in Washington by rank and percentile using July 1, 2017 data. The location Ranked # 1 has the highest value. A location that ranks higher than 75% of its peers would be in the 75th percentile of the peer group.

Variable Description Rank Percentile
Total Population # 107 82nd
Population Density # 38 94th
Diversity Index # 33 95th
Median Household Income # 194 67th
Per Capita Income # 321 45th

Additional comparisons and rankings can be made with a VERY EASY TO USE Washington Census Data Comparison Tool.

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