Gervasius is a masculine given name. It may refer to:
- Gervasius and Protasius, Christian martyrs, probably in the 2nd century
- Gervase of Tilbury (Gervasius Tilberiensis in Latin) (c. 1150–1220), English canon lawyer, statesman and cleric
- Gervasius de Wolvehope (fl. 1295–1302), English Member of Parliament
- Gervasius, Bishop of Nyitra (died after c. 1128), Hungarian prelate
- Gervasius, Bishop of Győr (died after 1157 or 1158), Hungarian prelate