The Terminal Port of Siasi is located in Siasi Island. It is about 130kms NE of BP Bongao and some 70km SSW of BP Jolo. It also serves the neighboring islands of Siasi Island.

The Terminal Port of Siasi is under the jurisdiction of the Port Management Office of Jolo.

Port Facility Layout
The wharf structure provides some 16+66m berth-length.  This is where bigger vessels could dock. Its west-end has a width of about 14m where small vessels could berth in varying ways (e.g. parallel, perpendicular or oblique positions).