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The City of Dayton is located in Columbia County in the state of Washington (WA).

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Dayton, Washington, a City, in Columbia County spans over 1.5 square miles and has a population of 2,526 citizens who are all invited to join us here on our site.
Latest Dayton, WA News:

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County Level News: Columbia County News
State Level News: State of Washington News
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Dayton, WA Map (Interactive)

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Dayton Latitude: 46.1651 Longitude: -117.8477

The Zip Code for Dayton, WA is: 99328

We also provide additional resources for the rest of Columbia County and the State of Washington.

The City of Dayton

Facts & Data:

Dayton Washington Physical Characteristics:

The City of Dayton has an area of 1.4 square miles
  • Land: 1.4260505791506 Sq. Mi. (100.00%)
  • Water: 0 Sq. Mi.(0.00%)
The Dayton City takes up 0.2% of the area of Columbia County.

Map Location Coordinates:

  • Latitude: +46.3169582
  • Longitude: -117.9767637
Dayton Land Water Pie Chart

Dayton, WA Population Data:

According to the 2010 U.S. Census, the population of Dayton was 2,526 people, which is 61.9 % of the entire population of Columbia County.


  • 49.05% Male
  • 50.95% Female


  • 91.647% White
  • 0.356% Black
  • 0.594% Asian
  • 1.86% American Indian/Alaskan Native
  • 0.55% Pacific Islander
  • 3.167% Mixed
  • 1.821% Other


  • 92.87% Not Hispanic or Latino
  • 7.13% Hispanic or Latino
Dayton Race Population Ring Chart

Dayton, WA Housing Information:

Average Household Size: 2.3
Number of Residences: 1,200
  • Occupied: 1,082 (90.17%)
  • Vacant: 118 (9.83%)
Spotlight Left Dayton Business Spotlight
Dayton Computer Works
737103 - Computers-System Designers & Consultants
242 E Main St # A, Dayton, Washington 99328-1353
Greg Post (509) 382-4717 (509) 382-1052
See more in the Dayton Business Directory
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