what county is longmont co in?
Adopt a page today. Longmont is located in the northeast corner of Boulder county, and a small portion of current Longmont is in Weld county. In Burlington, Boulder County, Colorado, the first gold rush settlers arrived in 1858 and the town became a post office in 1862 because the stagecoach stopped there. The little community later merged with Longmont and yielded the town name in 1873. The current Burlington Colorado is in Kit Carson county.