Steilacoom, WA 98388 ZIP Code Profile

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Steilacoom, WA

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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
  • Businesses Addresses: 131
  • Single Family Addresses: 2,221
  • Multi-Family Addresses: 487
  • County: Pierce County
  • Centroid: Latitude 47.171, Longitude -122.588
  • Time Zone: Pacific Time Zone (UTC -8 hours)
  • Observes DST: Yes

Neighborhood Data

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98388 ZIP Code Map

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Steilacoom, WA 98388 Data & Demographics (As of July 1, 2016)


Total Population 6,623
Population in Households 6,332
Population in Familes 5,106
Population in Group Qrtrs 291
Population Density1 713
Diversity Index2 52


Total Households 2,694
Average Household Size 2.35
Family Households 1,827
Average Family Size 3


Total Housing Units 2,994 (100%)
Owner Occupied HU 1,688 (56.4%)
Renter Occupied HU 1,006 (33.6%)
Vacant Housing Units 300 (10.0%)
Median Home Value $330,383
Average Home Value $416,114


Median Household Income $72,532
Average Household Income $99,564
Per Capita Income $42,004
  (Compound Annual Growth Rates)


2010-2015 2015-2020
Population -1.99% 0.87%
Households 0.6% 0.85%
Families 0.48% 0.79%
Median Household Income   2.74%
Per Capita Income   1.94%
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.

Steilacoom, WA 98388 - Peer Comparisons by Rank and Percentile

The table below compares 98388 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 # 269 54th
Population Density1 # 180 69th
Diversity Index2 # 181 69th
Median Household Income # 93 84th
Per Capita Income # 57 90th

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