Columbia County is the name of 8 counties in the United States of America: One additional county, Columbiana County, Ohio has a name sufficiently similar to merit reference on this page.

Because of its peculiar circumstances the entire District of Columbia is sometime treated as a county.

This is a disambiguation page; that is, one that just points to other pages that might otherwise have the same name. If you followed a link here, you might want to go back and fix that link to point to the appropriate specific page.