Castelverde, also named Gasr Garabulli,[2][3] is a town in the Tripoli District (Tarabulus), of the Tripolitania region in northwestern Libya.

In June 2016, citizens took up arms to defend against a militia from the nearby city of Misrata after a dispute developed between them.

During the conflict, a large blast killed 25 people.

The town is situated on the main road between Tripoli and Khoms, Libya, near the Mediterranean Sea coast.

The new Libyan railway line passes through Castelverde.