Tanzania maintains protected areas covering approximately 38 percent of its total land area, making it one of the African countries with the highest proportion of land under conservation management. The Tanzania National Parks Authority (TANAPA), established in 1959, administers 22 national parks spanning roughly 99,306 square kilometers. The Ngorongoro Conservation Area Authority operates independently under separate legislation dating to 1959, managing 8,292 square kilometers where wildlife conservation operates alongside sustained human habitation by Maasai pastoralists. The Tanzania Wildlife Management Authority oversees game reserves and controlled areas. Marine parks fall under the Marine Parks and Reserves Unit, which manages coastal and island protected zones.
Serengeti National Park covers 14,763 square kilometers in northwestern Tanzania, extending to the Kenya border where it connects with Maasai Mara National Reserve. The park was gazetted in 1951 and achieved UNESCO World Heritage status in 1981. The Serengeti ecosystem hosts approximately 1.5 million wildebeest, 250,000 zebras, and 500,000 Thomson's gazelles that participate in the annual migration cycle, moving in a roughly clockwise pattern through the ecosystem following seasonal rainfall. The migration typically reaches the Grumeti River in the western corridor between May and July, moves north toward Kenya between July and September, and returns south through the eastern plains between October and December. The park contains approximately 3,000 lions, representing one of the largest lion populations in Africa. Cheetah density reaches highest concentrations on the southeastern short-grass plains. The park supports around 500 bird species. Research stations at Seronera in the central plains have operated continuously since the 1960s. The Serengeti Cheetah Project, begun in 1980, maintains identification records for individual animals tracked across decades. The Frankfurt Zoological Society established the Serengeti Research Institute in 1966.
Ngorongoro Conservation Area encompasses 8,292 square kilometers including the Ngorongoro Crater, a collapsed volcanic caldera measuring approximately 19 kilometers in diameter with walls rising 400 to 610 meters above the crater floor. The caldera formed roughly 2.5 million years ago when a volcano estimated to have reached 4,500 to 5,800 meters in height collapsed inward. The crater floor sits at approximately 1,800 meters elevation and contains permanent water sources including Lake Magadi, a shallow alkaline lake. Wildlife populations on the crater floor remain relatively stable year-round due to water availability and grazing. Estimates from 2019 indicated approximately 25,000 large mammals inhabit the crater, including around 7,000 wildebeest, 6,000 buffalo, 3,000 eland, and 3,000 zebras. The crater contains one of the densest lion populations in the world, with roughly 60 to 70 individuals. Black rhinoceros numbers declined from an estimated 108 in 1964 to fewer than 30 by 1995, recovering to approximately 70 individuals by 2020 through intensive protection. The conservation area includes Olduvai Gorge, where Mary and Louis Leakey conducted excavations from 1959 that uncovered hominin fossils including Paranthropus boisei and Homo habilis dated to approximately 1.8 million years ago. Approximately 95,000 Maasai people reside within the conservation area, maintaining traditional pastoralist practices under regulations that restrict cultivation. The area received UNESCO World Heritage designation in 1979 and was inscribed as a UNESCO Biosphere Reserve in 1981.
Nyerere National Park, formerly the northern section of Selous Game Reserve, was designated a separate national park in 2019 covering approximately 30,893 square kilometers. The remaining southern portion of Selous, approximately 13,000 square kilometers, continues as a game reserve where sport hunting remains permitted. The combined area of 43,893 square kilometers made Selous the largest protected area in Africa when initially gazetted in 1922. The area received UNESCO World Heritage status in 1982 under the name Selous Game Reserve. The Rufiji River flows through the park, creating extensive wetlands and floodplains. Wildlife populations declined significantly between 2006 and 2013, with elephant numbers dropping from an estimated 70,000 to fewer than 15,000 due to poaching. African wild dogs maintain breeding populations in Nyerere, with an estimated 200 individuals recorded in surveys from 2019. The tsetse fly presence historically limited human settlement and livestock, reducing human-wildlife conflict compared to other regions. Boat safaris operate on the Rufiji River and associated lakes. The park administration operates from headquarters at Matambwe.
Ruaha National Park covers 20,226 square kilometers in central Tanzania, making it the country's largest national park. The park was established in 1964 initially covering 12,950 square kilometers, then expanded in 2008 to incorporate portions of the adjacent Rungwa Game Reserve. The Great Ruaha River forms the park's primary water source, typically flowing year-round although drought conditions have caused sections to dry seasonally in recent years. The park lies at the transition between eastern and southern African ecological zones, supporting plant species from both regions. Baobab trees concentrate in high densities throughout the park. Large mammal populations include approximately 12,000 elephants based on aerial surveys from 2019, representing one of Tanzania's most significant elephant populations. The park supports around 10 percent of the world's remaining lions, with research from the Ruaha Carnivore Project estimating approximately 400 individuals. African wild dog packs have been documented continuously since the 1990s. More than 570 bird species have been recorded in the park. Access requires driving approximately 130 kilometers west from Iringa on partially unpaved roads, or flying to the Msembe airstrip. The park remains closed to visitors during portions of the wet season between March and May when roads become impassable.
Tarangire National Park spans 2,850 square kilometers in northern Tanzania, approximately 120 kilometers southwest of Arusha. The park derives its name from the Tarangire River, which flows north through the park before emptying into Lake Burungi. During the dry season between June and October, the river provides the only permanent water source in the region, concentrating wildlife migrations from the surrounding Maasai Steppe. Dry season elephant concentrations reach approximately 3,000 to 5,000 individuals, representing one of the highest densities in Tanzania. The park contains distinctive baobab trees and extensive Acacia-Commiphora woodland. Tree-climbing lions have been observed regularly in the park's southern sections. More than 550 bird species have been recorded, with breeding colonies of yellow-collared lovebirds endemic to the region. The Tarangire Elephant Project has conducted continuous research since 1993, maintaining identification records for individual elephants and studying social structure across multi-generational family units. Swamps in the park's southern sections support year-round water and concentrate wildlife even during drought periods. Tourist infrastructure concentrates in the northern sections near the main entrance gate, while the southern areas receive fewer visitors despite supporting substantial wildlife populations.
Lake Manyara National Park covers 330 square kilometers, with approximately 230 square kilometers consisting of the alkaline Lake Manyara itself. The park occupies a narrow strip between the lake and the 600-meter-high Rift Valley escarpment. The park was established in 1960. Groundwater forests fed by springs from the escarpment support mahogany, wild mango, and fig trees in the northern entrance area. The park's tree-climbing lions became well-documented through research beginning in the 1960s, though the behavior's frequency and causes remain debated among researchers. The lake's alkalinity fluctuates with water levels, supporting populations of lesser flamingos that number in the tens of thousands during periods of favorable algae growth. More than 400 bird species have been recorded. Elephant populations in the park declined from approximately 400 individuals in the 1980s to fewer than 200 by 2000, with numbers gradually recovering under increased protection. The Lake Manyara Hippo Pool contains one of the region's largest hippo concentrations, with approximately 200 individuals. Night game drives became permitted in Lake Manyara in 2013, among the first Tanzanian national parks to allow nocturnal viewing. The park connects to the larger Manyara ecosystem extending south along the Rift Valley escarpment.