Hermas is a masculine given name. Notable people with the name include:

• Hermas of Dalmatia (1st century), one of the Seventy Disciples, feast day April 8
• Hermas of Philippopolis (1st century), one of the Seventy Disciples, feast day May 31
• Hermas (freedman) (2nd century), Christian mystic
• Hermas Deslauriers (1879–1941), Canadian physician

It is also a plant genus:

• Hermas (plant), a genus in the carrot family Apiaceae