Caledonia County is a county located in the northeastern part of the U.S. state of Vermont. As of the 2020 census, the population was 30,233. Its shire town is the town of St. Johnsbury. The county was created in 1792 and organized in 1796. It was given the Latin name for Scotland, in honor of the many settlers who claimed ancestry there.

The Northeast Kingdom is the northeast corner of the U.S. state of Vermont, approximately comprising Essex, Orleans, and Caledonia counties and with a population of 64,764 at the 2010 census. The term "Northeast Kingdom" is attributed to George D. Aiken, former Governor of Vermont and a U.S. senator, who first used the term in a 1949 speech.