Chinna Creek (Urdu: چنا کریک) is a lagoon, within the municipal boundaries of Karachi, on the Arabian Sea coastline, located in the south-west region of Sindh, Pakistan.

The natural landscape of Chinna Creek was characterised by a lush ecosystem dominated by dense mangrove growth, predominantly consisting of the species Avicennia marina.

[6] These mangroves played a crucial role in maintaining the ecological balance of the region, providing habitat and sustenance to diverse flora and fauna endemic to the coastal areas of Karachi.

[1] These combined discharges have implications for the marine ecosystem of Chinna Creek, leading to the degradation and loss of natural flora and fauna essential for maintaining a stable and beneficial ecological balance.

[12][10][13] Incidents like the 2013 mass fish mortality, when 100 tonnes of dead mullets were found floating in Karachi Port Trust waters, including Chinna Creek, remain little more than footnotes.

In 2018, although the Karachi Port Trust (KPT) is not directly responsible for managing marine pollution, it was tasked with establishing a treatment plant near Mai Kolachi Road along the Chinna Creek as part of a Wetland Park Project.