Castle Rock, WA 98611 ZIP Code Profile

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Castle Rock, WA

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ZIP Code 98611: Basic Data & USPS Preferred City Name

Preferred Name, USPS
Castle Rock, WA 98611

  • ZIP Code Type: STANDARD
  • Businesses Addresses: 164
  • Single Family Addresses: 3,241
  • Multi-Family Addresses: 37
  • County: Cowlitz County
  • Centroid: Latitude 46.287, Longitude -122.9
  • Time Zone: Pacific Time Zone (UTC -8 hours)
  • Observes DST: Yes

Neighborhood Data

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98611 ZIP Code Map

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Castle Rock, WA 98611 Data & Demographics (As of July 1, 2016)


Total Population 9,214
Population in Households 9,182
Population in Familes 7,671
Population in Group Qrtrs 32
Population Density1 81
Diversity Index2 21


Total Households 3,570
Average Household Size 2.57
Family Households 2,618
Average Family Size 3


Total Housing Units 3,805 (100%)
Owner Occupied HU 2,913 (76.6%)
Renter Occupied HU 657 (17.3%)
Vacant Housing Units 235 ( 6.2%)
Median Home Value $214,294
Average Home Value $273,292


Median Household Income $56,736
Average Household Income $67,414
Per Capita Income $26,237
  (Compound Annual Growth Rates)


2010-2015 2015-2020
Population 0.56% 0.43%
Households 0.47% 0.35%
Families 0.38% 0.3%
Median Household Income   1.78%
Per Capita Income   1.59%
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.

Castle Rock, WA 98611 - Peer Comparisons by Rank and Percentile

The table below compares 98611 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 # 237 60th
Population Density1 # 326 44th
Diversity Index2 # 485 17th
Median Household Income # 224 62nd
Per Capita Income # 330 44th

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