| Official Name: | Jaroso, Colorado |
| Pushpin Map: | Colorado |
| Pushpin Label Position: | left |
| Pushpin Map Caption: | Location within the state of Colorado |
| Subdivision Type: | Country |
| Subdivision Type1: | State |
| Subdivision Type2: | County |
| Subdivision Name2: | Costilla |
| Unit Pref: | Imperial |
| Timezone: | MST |
| Utc Offset: | -7 |
| Timezone Dst: | MDT |
| Utc Offset Dst: | -6 |
| Coordinates: | 37.0039°N -105.6239°W |
| Elevation M: | 2309 |
| Postal Code Type: | ZIP code |
| Postal Code: | 81138 |
| Blank Name: | GNIS feature ID |
| Blank Info: | 193115 |
Jaroso is an unincorporated community and a U.S. Post Office located in Costilla County, Colorado, United States. The Jaroso Post Office has the ZIP Code 81138.[1]
A post office called Joroso has been in operation since 1911.[2] Jaroso is a name derived from Spanish meaning "willows".[3]