| Type: | Archbishop |
| Honorific Prefix: | The Most Reverend |
| João Inácio Müller | |
| Honorific Suffix: | O.F.M. |
| Archbishop of Campinas | |
| Church: | Roman Catholic Church |
| Archdiocese: | Campinas |
| See: | Campinas |
| Appointed: | 5 May 2019 |
| Term Start: | 14 July 2019 |
| Predecessor: | Airton José dos Santos |
| Ordination: | 3 December 1988 |
| Consecration: | 15 December 2013 |
| Consecrated By: | Cláudio Hummes |
| Birth Name: | João Inácio Müller |
| Birth Date: | 1960 6, df=yes |
| Birth Place: | Santa Clara do Sul, Rio Grande do Sul, Brazil |
| Previous Post: | Bishop of Lorena (2013-19) |
| Alma Mater: | Pontifical Catholic University of Rio Grande do Sul Antonianum |
| Coat Of Arms: | Escudo de João Inácio Müller.svg |
| Motto: | Amor Dei Glória ("Love is the glory of God") |
João Inácio Müller, O.F.M. (born 15 June 1960) is a Brazilian Roman Catholic archbishop.
Ordained to the priesthood on 3 December 1988, Müller was named as the bishop of Lorena, Brazil on 25 September 2013.[1] On 5 May 2019, he was appointed as the Archbishop of Campinas.