The Dosso Partial Faunal Reserve is a nature reserve in the southwest Dosso Region of the African nation of Niger. It is a Partial Faunal Reserve IUCN type IV, established 1 January 1962. The reserve covers 3,065 square kilometres in the mouth of Dallol Bosso valley, a seasonal wash and ancient riverbed running from the Azawagh region, near where it reaches the Niger River valley. It is situated near the W du Niger National Park.