| San Mateo de Otao | |
| Native Name: | Utaw |
| Native Name Lang: | que |
| Settlement Type: | District |
| Mapsize: | frameless |
| Subdivision Type: | Country |
| Subdivision Name: |  Peru |
| Subdivision Type1: | Region |
| Subdivision Name1: | Lima |
| Subdivision Type2: | Province |
| Subdivision Name2: | Huarochirí |
| Parts Type: | Subdivisions |
| Parts Style: | para |
| Established Title: | Founded |
| Established Date: | November 7, 1944 |
| Seat Type: | Capital |
| Seat: | San Juan de Lanca |
| Leader Title: | Mayor |
| Leader Name: | Ysneyder Abdiel Espiritu (2019-2022) |
| Unit Pref: | Metric |
| Area Total Km2: | 123,91 |
| Elevation M: | 2259 |
| Population Total: | 1335 |
| Population As Of: | 2017 |
| Population Density Km2: | 18,96 |
| Timezone1: | PET |
| Utc Offset1: | -5 |
San Mateo de Otao is one of the 32 districts of the Huarochirí Province in the Lima Region. The district was created by order of the law Nº 10001 on November 7, 1944 and its capital is San Juan de Lanca.[1] It has 7 villages:
San Mateo de Otao District has some few tourist attractions: El Kurimakas, The ruins of Marca-marca, the ruins of Huarichaca, and Quinchicocha.
Also it is a district that has many valleys of fruits like chirimoyas, avocados, apples, tumbo, and other fruits.