Altona, Colorado
Altona is an unincorporated community and a census-designated place (CDP) located in and governed by Boulder [County, Colorado|Boulder County], Colorado, United States. The CDP is a part of the Boulder, CO Metropolitan Statistical Area. The population of the Altona CDP was 512 at the United States Census 2020. The Boulder post office serves the area.
History
The Altona, Colorado, post office operated from October 2, 1879, until July 15, 1916.Geography
Altona is located in central Boulder County where Left Hand Creek exits the Front Range of the Colorado Rockies. U.S. Highway 36 passes through the community, leading north to Lyons and south to Boulder. Altona is west of Longmont by Nelson Road.The Altona CDP has an area of including of water.