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, 2017)


Total Population 6,572
Daytime Population: Workers 1,398
Daytime Population: Residents 3,517
Total Daytime Population (TDP) 4,915
Ratio TDP/Total Population1 0.75
Population in Households 6,297
Population in Familes 5,070
Population in Group Qrtrs 275
Population Density2 711
Diversity Index3 53


Median Household Income $80,712
Average Household Income $108,502
Per Capita Income $45,448


Total Housing Units 2,945 (100%)
Owner Occupied HU 1,670 (56.7%)
Renter Occupied HU 996 (33.8%)
Vacant Housing Units 279 ( 9.5%)
Median Home Value $333,739
Average Home Value $406,811


Total Households 2,666
Average Household Size 2.36
Family Households 1,810
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.
  (Compound Annual Growth Rates)


2010-2015 2015-2020
Population -1.82% 0.62%
Households 0.37% 0.6%
Families 0.29% 0.55%
Median Household Income   2.44%
Per Capita Income   2.24%

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, 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 # 272 54th
Population Density # 180 69th
Diversity Index # 182 69th
Median Household Income # 72 88th
Per Capita Income # 53 91st

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

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