Sítio Rangedor State Park, State park in São Luís, Brazil.

Sítio Rangedor State Park is a protected natural area in central São Luís with walking trails, sports facilities, and native vegetation. The grounds contain several recreational zones designed for different types of outdoor activity.

State decree 21.797 of 2005 created the Sítio Rangedor Ecological Station with 126 hectares; decree 23.303 of 2007 cut it to about 121 hectares. A major fire hit the unit in December 2015. On 11 May 2016 the Legislative Assembly approved law 321/2015, renaming it Sítio do Rangedor State Park and opening it to recreation and ecological tourism, not only educational visits.

The park's eight plazas carry local names: Amor, Murici, Ouriços, Tiracambú and Pajeú, alongside the Praça do Esporte with its two multi-sport courts, sand court and tennis court. A butterfly garden opened in 2021 so visitors can follow the insect's life stages, and a food-truck village and Environmental Police battalion now operate on site.

The park lies in the Calhau neighbourhood, between the Sítio Santa Eulália and Sítio Rangedor lands. Its 2019 layout has eight squares, a 3.5 km cycle path, a walking track and parking for 500 vehicles. A food truck village and an Environmental Police battalion also operate on site. The rainy season runs from December to July, with about 2,200 mm of rain a year.

The park serves as a critical groundwater recharge area for São Luís because of its porous soil. Rainwater naturally seeps into the local aquifers, playing a hidden role in the city's water supply.