Colfax, WA 99111 ZIP Code Profile

Related Place Profiles:
Colfax, WA | Diamond, WA

ZIP Code 99111: Basic Data & USPS Preferred City Name

Preferred Name, USPS
Colfax, WA 99111

Acceptable Alternative
Diamond, WA 99111

  • ZIP Code Type: STANDARD
  • County: Whitman County
  • Centroid: Latitude 46.879, Longitude -117.357
  • Time Zone: Pacific Time Zone (UTC -8 hours)
  • Observes DST: Yes
  • Businesses Addresses: 229
  • PO Box Addresses: 147
  • Residential Addresses: 1,724
    • Multi-Family Addresses: 158
    • Single Family Addresses: 1,566

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. 99111 2019 Demographic Data
  2. Growth Rates for 99111 (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.


Colfax, WA 99111 Data & Demographics (As of July 1, 2019)


Total Population 4,290
Population in Households 4,183
Population in Familes 3,329
Population in Group Qrtrs 107
Population Density2 15
Diversity Index3 18


Median Household Income $57,791
Average Household Income $73,558
Per Capita Income $32,171


Total Housing Units 2,057 (100%)
Owner Occupied HU 1,180 (57.4%)
Renter Occupied HU 694 (33.7%)
Vacant Housing Units 183 ( 8.9%)
Median Home Value $186,270
Average Home Value $215,085


Total Households 1,874
Average Household Size 2.23
Family Households 1,175
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 0.67% 0.85%
Households 0.73% 0.94%
Families 0.78% 0.98%
Median Household Income   4.92%
Per Capita Income   3.98%

Colfax, WA 99111 - Peer Comparisons by Rank and Percentile

The table below compares 99111 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 # 307 48th
Population Density # 432 26th
Diversity Index # 542 8th
Median Household Income # 321 45th
Per Capita Income # 260 56th

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

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