| Type: | Bishop |
| Appointed: | --> |
| Term Start: | 3 April 1901 |
| Term End: | 16 February 1915 |
| Retired: | --> |
| Predecessor: | Ferdinand Hamer |
| Successor: | Louis van Dyck |
| Alfonso Bermyn | |
| Church: | Cathedral of the Sacred Heart in Hohhot |
| Province: | Suiyuan |
| Ordination: | 10 June 1876 |
| Birth Date: | 3 January 1853 |
| Birth Place: | St. Paul de Waes, Belgium |
| Death Place: | Hohhot, Republic of China |
| Tomb: | --> |
| Religion: | Roman Catholic |
| Partner: | --> |
Alfonso Bermyn (; 3 January 1853 – 16 February 1915) was a Belgian Catholic priest, missionary, and Bishop of the Roman Catholic Archdiocese of Suiyuan between 1901 and 1915.[1]
Alfonso Bermyn was born in St. Paul de Waes, Belgium, on 3 January 1853. He was ordained a priest on 10 June 1876. He joined the CICM Missionaries on 4 March 1878. He went to Mongolia to preach in the same year. In April 1901, the Holy See appointed him as Bishop of the Roman Catholic Archdiocese of Suiyuan to replace Ferdinand Hamer, who died in the Boxer Rebellion last year. He was consecrated on 26 January 1902.
He died on 16 February 1915, aged 62.