Coulee City, WA 99115 ZIP Code Profile

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Coulee City, WA

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ZIP Code 99115: Basic Data & USPS Preferred City Name

Preferred Name, USPS
Coulee City, WA 99115

  • ZIP Code Type: STANDARD
  • County: Grant County
  • Centroid: Latitude 47.634, Longitude -119.253
  • Time Zone: Pacific Time Zone (UTC -8 hours)
  • Observes DST: Yes
  • Businesses Addresses: 59
  • PO Box Addresses: 367
  • Residential Addresses: 208
    • Multi-Family Addresses: 0
    • Single Family Addresses: 208

The ZIP Code maps and database are updated 4 times per year.
Database updated: February 1, 2018, Maps updated: February 1, 2018.

EXTREMELY LOCAL Demographic Data

Address Based Hyperlocal Data Input an address and get data & demographics for the pertinent census block group (CBG), a searchable map and a customized directory. The CBG is the smallest geographical unit used by the Census Bureau for reporting demographic data.


99115 ZIP Code Map

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Coulee City, WA 99115 Data & Demographics (As of July 1, 2017)


Total Population 1,120
Daytime Population: Workers 508
Daytime Population: Residents 654
Total Daytime Population (TDP) 1,162
Ratio TDP/Total Population1 1.04
Population in Households 1,117
Population in Familes 856
Population in Group Qrtrs 3
Population Density2 4
Diversity Index3 23


Median Household Income $46,204
Average Household Income $66,738
Per Capita Income $30,564


Total Housing Units 889 (100%)
Owner Occupied HU 381 (42.9%)
Renter Occupied HU 131 (14.7%)
Vacant Housing Units 377 (42.4%)
Median Home Value $167,130
Average Home Value $209,646


Total Households 512
Average Household Size 2.18
Family Households 314
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.


2010-2017 2017-2022
Population 0.04% 0.21%
Households -0.05% 0.12%
Families -0.17% 0.06%
Median Household Income   4.56%
Per Capita Income   4.53%

Coulee City, WA 99115 - Peer Comparisons by Rank and Percentile

The table below compares 99115 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 # 414 29th
Population Density # 520 11th
Diversity Index # 458 22nd
Median Household Income # 436 26th
Per Capita Income # 243 59th

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

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