| Honorific Prefix: | Saint |
| Satyrus of Milan | |
| Birth Date: | around 331 |
| Death Date: | 378 |
| Feast Day: | September 17 |
| Venerated In: | Roman Catholic Church |
| Birth Place: | Trier, Germany |
| Death Place: | Milan, Italy |
| Patronage: | sacristans of the Archdiocese of Milano[1] |
| Major Shrine: | Basilica of Sant'Ambrogio, Milan |
Satyrus of Milan (it|San Satiro) was an Italian Catholic administrator born in Augusta Treverorum (modern Trier), who was the brother of Ambrose of Milan and Marcellina. He was born around 331 at Trier, Germany, moved to Rome with his family and was subsequently trained as a lawyer.
Appointed prefect to one of the Roman provinces, he resigned his post when Ambrose became Archbishop of Milan in order to assume administration of the secular affairs of the archdiocese.
He died unexpectedly at Milan in 378 and was eulogised by his brother with the funeral sermon, On the Death of a Brother (De excessu fratris Satyri). The church of Santa Maria presso San Satiro in Milan refers to him.[1]