Seattle, WA 98121 ZIP Code Profile

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Seattle, WA

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ZIP Code 98121: Basic Data & USPS Preferred City Name

Preferred Name, USPS
Seattle, WA 98121

  • ZIP Code Type: STANDARD
  • Businesses Addresses: 1,215
  • Single Family Addresses: 1,738
  • Multi-Family Addresses: 10,198
  • County: King County
  • Centroid: Latitude 47.613, Longitude -122.344
  • Time Zone: Pacific Time Zone (UTC -8 hours)
  • Observes DST: Yes

Neighborhood 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 certain data.


98121 ZIP Code Map

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Seattle, WA 98121 Data & Demographics (As of July 1, 2016)


Total Population 15,613
Population in Households 14,885
Population in Familes 3,976
Population in Group Qrtrs 728
Population Density1 35,492
Diversity Index2 59


Total Households 10,809
Average Household Size 1.38
Family Households 1,790
Average Family Size 2


Total Housing Units 12,582 (100%)
Owner Occupied HU 2,459 (19.5%)
Renter Occupied HU 8,350 (66.4%)
Vacant Housing Units 1,773 (14.1%)
Median Home Value $433,541
Average Home Value $534,394


Median Household Income $60,549
Average Household Income $87,653
Per Capita Income $61,708
  (Compound Annual Growth Rates)


2010-2015 2015-2020
Population 3.25% 2.64%
Households 3.38% 2.6%
Families 3.09% 2.53%
Median Household Income   2.09%
Per Capita Income   1.62%
1) Population Density = Total Population per square mile.
2) The Diversity Index is a scale of 0 to 100 that represents the likelyhood 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.
Based on Census 2010 counts, the Diversity Index for the United States was 60.6 and it is expected to increase to 64.8 by July 1, 2018.

Seattle, WA 98121 - Peer Comparisons by Rank and Percentile

The table below compares 98121 to the other 585 ZIP Codes in Washington by rank and percentile using July 1, 2016 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 # 186 68th
Population Density1 # 1 100th
Diversity Index2 # 130 78th
Median Household Income # 174 70th
Per Capita Income # 10 98th

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