This dataset contains density estimates derived by line distance sampling surveys for elephant (Loxodonta africana), giraffe (Giraffa tippelskirchi), zebra (Equus quagga) and wildebeest (Connochaetes taurinus) across six management units (TNP: Tarangire National Park; LMNP: Lake Manyara National Park; BWMA: Burunge Wildlife Management Area; RWMA: Randilen Wildlife Management Area; MR: Manyara Ranch; MGCA: Mto wa Mbu Game Controlled Area) in the Tarangire Ecosystem, northern Tanzania. The Rcode allows replicating the analyses. Please refer to the Rcode for more instructions.