The Port Muhammad Bin Qasim (Urdu: محمد بن قاسم بندرگاہ Bandar-gāh Muhammad bin Qāsim), or Qasim Port Authority (Urdu: مقتدرہ قاسم بندرگاہ), also known as Port Qasim, is a deep-water seaport in Karachi, Sindh, Pakistan, on the coastline of the Arabian Sea under the administrative control of the Secretary to the Government of Pakistan for Maritime Affairs.

It is located in an old channel of the Indus River at a distance of 35 kilometres east of Karachi city center.

The geographic position of the Port Qasim places it in close proximity to major shipping routes.

Port Qasim has planned for a major expansion in coming years with FDI of US$1.22 billion approximately.

Several species of reptiles, birds, and terrestrial mammals inhabit the project area, wherever suitable habitats are found.

As a part of this, initiative has been taken on conservation of the mangrove ecosystem in the Korangi – Phitti Creek system, in the Indus Delta (including Port Qasim area).

[16][18] In August 2003, the beach immediately west of the Port Qasim navigation channel was the scene of a major oil spillage when the Greek-registered Tasman Spirit ran aground.

The environmental impact included large numbers of dead fish and turtles and a key mangrove forest, as well as dozens of people suffering nausea.