Seattle, WA 98188 ZIP Code Profile


ZIP Code 98188: Basic Data & USPS Preferred City Name

Preferred Name, USPS
Seattle, WA 98188

Acceptable Alternative
Seatac, WA 98188
Tukwila, WA 98188

Not Acceptable, USPS
Duwamish, WA 98188
McMicken Heights, WA 98188
Riverton, WA 98188

  • ZIP Code Type: STANDARD
  • County: King County
  • Centroid: Latitude 47.446, Longitude -122.269
  • Time Zone: Pacific Time Zone (UTC -8 hours)
  • Observes DST: Yes
  • Businesses Addresses: 1,738
  • PO Box Addresses: 0
  • Residential Addresses: 9,934
    • Multi-Family Addresses: 4,886
    • Single Family Addresses: 5,048

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.


98188 ZIP Code Map

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Seattle, WA 98188 Data & Demographics (As of July 1, 2017)


Total Population 24,163
Daytime Population: Workers 33,120
Daytime Population: Residents 12,703
Total Daytime Population (TDP) 45,823
Ratio TDP/Total Population1 1.90
Population in Households 24,079
Population in Familes 17,930
Population in Group Qrtrs 84
Population Density2 2,777
Diversity Index3 83


Median Household Income $47,985
Average Household Income $64,319
Per Capita Income $24,935


Total Housing Units 9,839 (100%)
Owner Occupied HU 4,538 (46.1%)
Renter Occupied HU 4,785 (48.6%)
Vacant Housing Units 516 ( 5.2%)
Median Home Value $275,426
Average Home Value $312,682


Total Households 9,323
Average Household Size 2.58
Family Households 5,443
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 1.05% 1.07%
Households 0.75% 0.9%
Families 0.81% 0.94%
Median Household Income   1.89%
Per Capita Income   2.44%

Seattle, WA 98188 - Peer Comparisons by Rank and Percentile

The table below compares 98188 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 # 133 77th
Population Density # 110 81st
Diversity Index # 13 98th
Median Household Income # 411 30th
Per Capita Income # 410 30th

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

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