Chabab Riadhi Baladiat Aïn Oussara (Arabic: الشباب الرياضي لبدية عين وسارة), known as CRB Aïn Oussera or CRBAO for short, is an Algerian football club based in Aïn Oussera, Djelfa.

The club was founded in 1947 and its colours are green and white.

In 2012, while playing in the fourth division, CRB Aïn Oussera reached the quarter-finals of the 2011–12 Algerian Cup.

[1] They were the only team outside of the top flight to reach that stage.

On August 5, 2020, CRB Aïn Oussera were promoted to the Algerian Ligue 2.