The commune borders the provinces of Bouira and Bordj Bou Arreridj, and is bounded by Tazmalt to the north, Aït Rizine and Ighil Ali to the east, Ighil Ali again to the south, Chorfa, Bouïra and Ath Mansour Taourirt (Bouira Province) to the west, and finally Ouled Sidi Brahim (Bordj Bou Arreridj) to the southwest.

- Boudjellil is one of the three communes that make up the historic tribe of Ath Abbes along with Ait R'zine and Ighil Ali.

Boudjellil is the largest commune in the Béjaïa Province with an area of 99.85 km2 (38.55 sq mi) Winters were mild, with average temperatures around 12°C in January.

In summary, Boudjellil experienced a varied climate in 2024, with very hot and dry summers, mild winters with some light rain, and pleasant springs and autumns.

Threatened by a devastating epidemic, they had to abandon their lands and seek refuge mainly on the heights of Tinicwin (Agrur Nu Zimba) before finally settling in Azru, Abaliche, and Tighilt.