The district boundary is shared with Sabak Bernam at the north, Hulu Selangor and Gombak at the west, Petaling at the southwest and Klang at the south.

The geography of Kuala Selangor is characterised by a flat land in Tanjung Karang and Jeram.

Kuala Selangor District is divided into 9 mukims, which are:[4] List of Kuala Selangor district representatives in the Federal Parliament (Dewan Rakyat) List of Kuala Selangor district representatives in the State Legislative Assembly (Dewan Undangan Negeri) The Kuala Selangor District Council is seeking for the area to become declared as a municipality.

Another expressway which is under construction named West Coast Expressway (WCE) in Tanjung Karang only have small amount of them which only provided in the township of Tanjung Karang and some sub-roads in some villages.

The Local Planning Masterplan for the year 2015 released by MDKS envision the addition of a Light Rail Transit facility (linking Bestari Jaya, Puncak Alam and Shah Alam) in the future.