Vologases (Parthian: Walagash, Middle Persian: Wardakhsh/Walakshsh, , Balash), also known as Vologaeses, Vologaesus, Vologeses, Ologases, and Valarsh (Armenian), was the name of various ancient monarchs:

• Vologases I c. 51–78
• Vologases II c. 77–80
• Vologases III c. 105–147
• Vologases IV c. 147–191
• Vologases V c. 191–208
• Vologases VI c. 208–228