The Peninsular Malaysian peat swamp forests is an ecoregion on Malay Peninsula, which includes portions of Malaysia.

[2] The ecoregion covers an area of 3,600 square kilometers (1,400 sq mi) on both the eastern and western sides of the peninsula.

The peat swamp forests have formed over hundreds of years, as sediment and organic debris deposited by rivers are trapped behind mangroves, gradually building up a layer of waterlogged, acidic, nutrient-poor soil.

Pandan (Pandanus amaryllifolius) and the red sealing wax palm (Cyrtostachys renda) are common understory plants.

The ecoregion home to many endangered species, including tigers, Malayan tapirs (Tapirus indicus), clouded leopards (Neofelis nebulosa), Asian elephants (Elephas maximus), and previously also Sumatran rhinoceroses (Dicerorhinus sumatrensis).