| Official Name: | San Asensio |
| Settlement Type: | Municipality |
| Pushpin Map: | Spain La Rioja#Spain |
| Map Caption1: | Location of San Asensiowithin Spain |
| Subdivision Type: | Country |
| Subdivision Type1: | Autonomous community |
| Subdivision Type2: | Comarca |
| Subdivision Name2: | Haro |
| Leader Title: | Mayor |
| Leader Name: | Juan Francisco Blanco Zalvidea (PSOE) |
| Area Total Km2: | 32.33 |
| Population Density Km2: | auto |
| Population Demonym: | sanasensiano, na |
| Timezone: | CET |
| Utc Offset: | +1 |
| Timezone Dst: | CET |
| Utc Offset Dst: | +2 |
| Elevation M: | 530 |
San Asensio is a municipality and town in the La Rioja autonomous community, northern Spain.
San Asensio has a tradition of wine production and is known for its rosés.[1] Production is regulated by the Denominación de origen system. The Rioja DOC is divided into 3 sub-regions, San Asensio being in Rioja Alta.[2]