| Official Name: | Jansen, Colorado |
| Settlement Type: | Census Designated Place |
| Pushpin Map: | USA |
| Pushpin Label: | Jansen |
| Pushpin Label Position: | right |
| Pushpin Map Caption: | Location of the Jansen CDP in the |
| Subdivision Type: | Country |
| Subdivision Name: |  United States |
| Subdivision Type1: | State |
| Subdivision Type2: | County |
| Subdivision Name2: | Las Animas County |
| Government Type: | unincorporated community |
| Unit Pref: | Imperial |
| Area Footnotes: | [1] |
| Area Total Km2: | 3.039 |
| Area Land Km2: | 3.039 |
| Area Water Km2: | 0.000 |
| Population As Of: | 2020 |
| Population Footnotes: | [2] |
| Population Total: | 101 |
| Population Density Km2: | auto |
| Population Density Sq Mi: | auto |
| Timezone: | MST |
| Utc Offset: | -7 |
| Timezone Dst: | MDT |
| Utc Offset Dst: | -6 |
| Coordinates: | 37.1581°N -104.55°W |
| Elevation Ft: | 6240 |
| Postal Code Type: | ZIP Code[3] |
| Postal Code: | 81082 |
| Area Code: | 719 |
| Blank Name: | GNIS feature id |
| Blank Info: | 2583252 |
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 101 at the United States Census 2020. The Trinidad post office (Zip Code 81082) serves the Jansen postal addresses.[3]
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 2miles to Trinidad, the county seat, and west 5miles to Cokedale.
The Jansen CDP has an area of 3.039km2, all land.[1]
The United States Census Bureau initially defined the for the