Castle Rock, WA 98611 ZIP Code Profile

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Castle Rock, WA

ZIP Code 98611: Basic Data & USPS Preferred City Name

Preferred Name, USPS
Castle Rock, WA 98611

  • ZIP Code Type: STANDARD
  • County: Cowlitz County
  • Centroid: Latitude 46.287, Longitude -122.9
  • Time Zone: Pacific Time Zone (UTC -8 hours)
  • Observes DST: Yes
  • Businesses Addresses: 188
  • PO Box Addresses: 1,132
  • Residential Addresses: 3,435
    • Multi-Family Addresses: 50
    • Single Family Addresses: 3,385

The ZIP Code maps and database are updated 4 times per year.
Database updated: August 1, 2019, Maps updated: August 2, 2019.

Jump to... (On This Page!)
  1. 98611 2019 Demographic Data
  2. Growth Rates for 98611 (Historical & 5-Year Forecast)
  3. Peer Comparisons (Rank and Percentile)
  1. Neighborhoods Demographics (Home Values, Household Income, etc.)
  2. Washington Research Tools (Easy Tools & Current Data)
  3. Washington Data Comparison Tool - 2019 Demographics

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Boundary Maps, Demographic Data, School Zones Review maps and data for the neighborhood, city, county, ZIP Code, and school zone. July 1, 2019, data includes home values, household income, percentage of homes owned, rented or vacant, etc.


Castle Rock, WA 98611 Data & Demographics (As of July 1, 2019)


Total Population 9,654
Population in Households 9,622
Population in Familes 8,027
Population in Group Qrtrs 32
Population Density2 86
Diversity Index3 22


Median Household Income $63,601
Average Household Income $75,558
Per Capita Income $29,190


Total Housing Units 3,973 (100%)
Owner Occupied HU 3,199 (80.5%)
Renter Occupied HU 530 (13.3%)
Vacant Housing Units 244 ( 6.1%)
Median Home Value $285,966
Average Home Value $299,265


Total Households 3,729
Average Household Size 2.58
Family Households 2,731
Average Family Size 3
  1. Demographics are point estimates for July 1st of the current year and each for the forecast years. See References for more information.
  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.


2010-2019 2019-2024
Population 0.84% 0.81%
Households 0.77% 0.77%
Families 0.68% 0.73%
Median Household Income   3.63%
Per Capita Income   3.11%

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

The table below compares 98611 to the other 587 ZIP Codes in Washington by rank and percentile using July 1, 2019 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 # 242 59th
Population Density # 329 44th
Diversity Index # 479 18th
Median Household Income # 250 58th
Per Capita Income # 351 40th

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

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