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Rio Blanco County, Colorado

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Rio Blanco County, Colorado — CC BY-SA 3.0, Jeffrey Beall · source

County profile

About Rio Blanco County

Rio Blanco County is a county located in the U.S. state of Colorado. As of the 2020 census, the population was 6,529. The county seat is Meeker. The name of the county is the Spanish name for the White River which runs through it.

Description adapted from Wikipedia, CC BY-SA 4.0.

At a glance

Rio Blanco County at a glance

County seat
Meeker
Population
6,529 (2020)
Land area
3,223 sq mi
Founded
1889

Communities

Largest communities in Rio Blanco County

CommunityPopulation
Meeker County seat2,374
Rangely2,299

History

History of Rio Blanco County

Rio Blanco County was created on March 25, 1889, when it was split from Garfield County. The town of Meeker became the county seat. On May 17, 1973, Rio Blanco County became one of two counties in Colorado to have a peaceful nuclear explosion as a part of Operation Plowshare. There were three nearly simultaneous explosions targeted at producing unconventional natural gas, all detonated as Project Rio Blanco. The other county is Garfield County under Project Rulison. In August 2025, the Lee Fire burned in Rio Blanco County. The fire burned over 137,000 acres, becoming the fourth-largest wildfire in Colorado history.

Adapted from Wikipedia, CC BY-SA 4.0.

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Official channels

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Neighbors

Neighboring counties

About

Part of Colorado Voter Check

This is the Rio Blanco County page of Colorado Voter Check, a project of True the Vote, pointing Colorado voters at the official tools that already exist — and at Scan Check Protect to verify your registration.

Where anything here differs from what Rio Blanco County or the Colorado Secretary of State publishes, they are right and this page is not.