Kukup island is an uninhabited island located in the south-western region of the state of Johor in Peninsular Malaysia. It is located about 1 km offshore from the mainland town called Kukup Laut. The island is about 647 ha in size with an 800 ha intertidal mudflat around the island.

The island was gazetted as a State Park in 1997 and it was designated as a Ramsar site of Malaysia in 2003. Pulau Kukup is a popular tourism site. Every year there is a high flow of tourists from neighbouring countries like Singapore and Indonesia visiting Kukup town for its famous seafood. This highly populated town is a fishing village and dominated by the Chinese.

In June 2003, Johor State Park Corporation developed some facilities at Kukup island to promote the ecotourism industry. A boardwalk and a suspension bridge overhanging the mangrove vegetation have been built for tourists to appreciate nature more closely. A tourist information cum education center has been established at Kukup Laut Town.

Biological diversity in Kukup island is high. There are 30 species of true mangrove and associated species, 12 wildlife species, 11 waterbird species include the Vulnerable Lesser Adjutant Stork.

Wetlands International in collaboration with Johor State Park Corporation (PTNJ) and funding from Keidanren Nature Conservation Foundation started a one-year conservation project on Pulau Kukup mangrove island. The project was carried out from June 2004 till May 2005.

The objectives of the project include:
- To promote the importance and significant values of Kukup mangrove
- To promote the implementation of an environmental education and awareness programme among the local community and visitors to Kukup wetland.