- Silent Valley National Park is located in the Palakkad and Malappuram districts of the state of Kerala, India.
- The park is situated in the Nilgiri Hills of the Western Ghats.
- The park is particularly known for its extensive population of orchids.
- In 1914, the forest area of the Silent Valley was notified as reserved forest.
- In 1984, Silent Valley was declared a national park.
- In1986, the Silent Valley National Park was included in the core area of Nilgiri Biosphere Reserve.
- Area: Park covers an area of approximately 89 square kilometers (34 square miles).
- River: Kunthipuzha River flows through the park.
- Tribe: Park is home to indigenous tribal communities who have inhabited the region for centuries.
- Kurumba
- Muduga
- Irula
- Kattu Naiken
- Flora: West-coast Tropical Evergreen Forest (ironwood, cullenia and Vateria white dammar), Southern Subtropical Broadleaved Hill Forest (Nilgiri magnolia, rose apple, and crepe myrtle), Southern Montane Wet Temperate Forest (Rhododendron arboreum , Elaeocarpus recurvatus, and Quercus spp. (oak)), Grassland, Orchids, Epiphytes etc.
- Fauna: Lion-tailed Macaque, Nilgiri Langur, Elephant, Tiger, Leopard, Panther, Sloth Bear, Malabar Giant Squirrel, Nilgiri Wood Pigeon, Nilgiri Flycatcher,Nilgiri Pipit,King Cobra,Shield Tail Snake etc.