Welcome to Columbia County ...

Time Zone: Columbia County lies in the Pacific Time Zone (PST/PDT) and observes daylight saving time.

The community of Dayton is the Seat for Columbia County.

Columbia County was founded in 1875 and was created by taking area from Walla Walla County.

From the Census Estimates for 2019, <1> Columbia had a population of 3,985 people. This is a decrease of 2.66% since the last Census (which gave a population of 4,094 people in 2010).

At the time of the 2010 Census, Columbia represented 0.06% of the total population of Washington.

Websites of Interest ...

• Websites specific to Washington
  • Jump to Cyndi's List
  • Jump to Family Search
  • Jump to Genealogy Trails
  • Website for the Washington State Archives

• Websites specific to Columbia County
  • Jump to Cyndi's List
  • Jump to Family Search
  • Jump to Genealogy Trails

• Websites for nearby counties
  • Whitman County
    • Jump to Cyndi's List
    • Jump to Family Search
    • Jump to Genealogy Trails
  • Garfield County
    • Jump to Cyndi's List
    • Jump to Family Search
    • Jump to Genealogy Trails
  • Wallowa County
    • Jump to Cyndi's List
    • Jump to Family Search
    • Jump to Genealogy Trails
  • Umatilla County
    • Jump to Cyndi's List
    • Jump to Family Search
    • Jump to Genealogy Trails
  • Walla Walla County
    • Jump to Cyndi's List
    • Jump to Family Search
    • Jump to Genealogy Trails
  • Franklin County
    • Jump to Cyndi's List
    • Jump to Family Search
    • Jump to Genealogy Trails

• Cemetery Information and Directories
  • Cemetery Junction: Cemeteries of Washington
  • Cyndi's List
  • Cemeteries of Washington
  • Cemeteries of Columbia County
  • FamilySearch.org: Cemeteries of Washington
  • Find-A-Grave: Home Page
  • Interment.net
  • Cemeteries of Washington
  • Cemeteries of Columbia County