Olzhas or Oljas () is a masculine given name. Notable people with the name include:
Oljas Bektenov (born 1980), Prime Minister of Kazakhstan Olzhas Kerimzhanov (born 1989), Kazakh football defender Olzhas Orazaliyev (born 1980), Kazakh amateur boxer Olzhas Sattibayev (born 1988), Kazakh boxer Olzhas Suleimenov, Kazakh poet, politician, and activist