Jansen is an unincorporated community and a census-designated place (CDP) located in and governed by Las Animas County, Colorado, United States. The population of the Jansen CDP was 112 at the United States Census 2010. The Trinidad post office (Zip Code 81082) serves the Jansen postal addresses. Geography Jansen is located in western Las Animas County in the valley of the Purgatoire River. Colorado State Highway 12 passes through the community, leading northeast to Trinidad, the county seat, and west to Cokedale. The Jansen CDP has an area of , all land. Demographics The United States Census Bureau initially defined the for the See also Outline of Colorado Index of Colorado-related articles State of Colorado Colorado cities and towns Colorado census designated places Colorado counties Las Animas County, Colorado References External links Las Animas County website Census-designated places in Las Animas County, Colorado Census-designated places in Colorado