Tinfunqué National Park, Natural reserve in western Paraguay

Tinfunqué National Park is a large protected area in western Paraguay featuring extensive wetlands and natural grasslands shaped by seasonal flooding. The park's water systems and vegetation patterns create habitat for diverse wildlife throughout the region.

Bolivian troops founded Fortín Tinfunqué on this site in 1924, before the Chaco War of 1932–1935. The 1938 peace treaty placed the area definitively in Paraguay. A national park was created by Decree No. 18.205 on 4 May 1966, covering 241,320 hectares, and in 1995 it was declared a Ramsar site. On 30 November 2016 it was recategorised as a Managed Resources Reserve.

The name Tinfunqué comes from the Nivaclé word Tinjoqee, meaning "natural watering hole" or "drinking well", though some attribute it to Toba, meaning "prairie with abundant animals". Both refer to the flooded plain where people and animals drink. The area is private cattle ranches, so visitors see cowboy life alongside wetland wildlife.

The park is located far from urban centers and requires a long journey on rural roads to access. Visitors should expect basic facilities and be prepared with a suitable vehicle, especially during the rainy season.

The name Tinfunqué probably comes from the Nivaclé word Tinjoqee, meaning "natural watering hole" or "drinking pool"; other authors attribute it to Toba, meaning "prairie with an abundance of animals". The reserve lies on private cattle estancias, so the state does not own most of the land and the owners themselves maintain conservation. The Fortín Tinfunqué was founded here by Bolivian soldiers in 1924.