Minziro Forest Reserve, Nature reserve in Bukoba Rural District, Tanzania

Minziro Forest Reserve covers 24,841 hectares along the Kagera River in fairly level terrain at about 1,150 metres. Most of it is Baikiaea–Podocarpus seasonal swamp forest, with flooded acacia woodland in the remainder, and it continues across the Uganda border as Malabigambo Forest.

The forest received official protection in 1947 to preserve one of Tanzania's largest forests. This decision helped safeguard the forest system that continues across the border with Uganda.

Pastoralists from outside the reserve enter its central grasslands illegally to graze their herds, and they burn the grassland as they do so. This burning harms the over-wintering population of blue swallows and affects the vegetation where forest meets grassland. In 2017 the Bukoba magistrate's court fined one trespassing pastoralist and voiced dismay at the escalating environmental damage.

The reserve is accessible from Bukoba through Bunazi town or from the Mutukula area near the Tanzania-Uganda border. Visitors should be prepared for remote terrain and swampy areas that can be difficult to navigate depending on the season.

Of the 245 bird species recorded here, 56 have been seen only in Minziro, and 58 occur nowhere else in Tanzania outside Kagera. The reserve also holds more than 600 butterfly species, a count no other African forest is known to exceed.