Steilacoom, WA 98388 ZIP Code Profile

Related Place Profiles:
Steilacoom, WA

ZIP Code 98388: Basic Data & USPS Preferred City Name

Preferred Name, USPS
Steilacoom, WA 98388

Not Acceptable, USPS
Ketron Is, WA 98388
Ketron Island, WA 98388
McNeil Island, WA 98388

  • ZIP Code Type: STANDARD
  • County: Pierce County
  • Centroid: Latitude 47.171, Longitude -122.588
  • Time Zone: Pacific Time Zone (UTC -8 hours)
  • Observes DST: Yes
  • Businesses Addresses: 129
  • PO Box Addresses: 331
  • Residential Addresses: 2,743
    • Multi-Family Addresses: 486
    • Single Family Addresses: 2,257

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

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Steilacoom, WA 98388 Data & Demographics (As of July 1, 2018)


Total Population 6,769
Population in Households 6,497
Population in Familes 5,265
Population in Group Qrtrs 272
Population Density1 724
Diversity Index2 53


Median Household Income $83,286
Average Household Income $114,910
Per Capita Income $47,890


Total Housing Units 2,979 (100%)
Owner Occupied HU 1,718 (57.7%)
Renter Occupied HU 1,022 (34.3%)
Vacant Housing Units 239 ( 8.0%)
Median Home Value $381,176
Average Home Value $435,259


Total Households 2,740
Average Household Size 2.37
Family Households 1,857
Average Family Size 3
  1. Population Density = Total Population per square mile.
  2. 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 -1.25% 1.04%
Households 0.66% 1.0%
Families 0.56% 0.94%
Median Household Income   3.6%
Per Capita Income   2.81%

Steilacoom, WA 98388 - Peer Comparisons by Rank and Percentile

The table below compares 98388 to the other 581 ZIP Codes in Washington by rank and percentile using July 1, 2018 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 # 269 54th
Population Density # 177 70th
Diversity Index # 176 70th
Median Household Income # 83 86th
Per Capita Income # 55 91st

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

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