| Gewilib | |
| Other Names: | Gewiliobus, Gewilip, Wieliebus |
| Death Date: | 758 |
| Death Place: | Sponsheim |
| Offices Held: | Bishop of the Roman Catholic Diocese of Mainz |
| Relatives: | Geroldus of Mainz (father) |
Gewilib (died 758 in Sponsheim, also Gewiliobus, Gewilip, Wieliebus) was a bishop of the Roman Catholic Diocese of Mainz. He was the son of Geroldus of Mainz and his successor as a bishop.[1] He was deposed by Saint Boniface in 745, who succeeded him.