Vologases (Parthian: Walagash, Middle Persian: Wardākhsh/Walākshsh, , Balāsh), also known as Vologaeses, Vologaesus, Vologeses, Ologases, and Valarsh (Armenian), was the name of various ancient monarchs:
Kings of Parthia
- 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
Kings of Armenia
- Vologases I ruled 117/8–144
- Vologases II ruled 186–198
- Vologases III ruled 378-386 co-king with his brother Arsaces III
Others
- Vologases (chief) - chief of the Thracian Bessi, who led a revolt against the Romans in 13 BC
- A later Balash which belonged to the Sassanid dynasty
- Vologases, King of Elymais, (c. 180- c. 190 AD)
- Vologash, King of Hatra