Sainte Luce Reserve, Nature reserve in southeastern Madagascar.

Sainte Luce Reserve is a nature reserve along southeastern Madagascar's coast with rainforest, mangrove areas, and beaches. It spans approximately one kilometer along the shoreline and protects several different habitats in a small concentrated area.

Sainte Luce Reserve is private land, managed by the Filana Association since 2010. It lies within the greater Sainte Luce rainforest, a strip about 15 km long and 100 to 700 m wide, of which the reserve covers roughly 1 km by 300 m. The surrounding littoral forest is threatened by slash-and-burn farming (tavy) and by mining of titanium-rich sands near Tolagnaro.

The reserve is managed by the Filana Association, which has run it since 2010, and volunteers carry out much of the conservation work: lemur research, sea turtle monitoring, seed collecting, tree planting and community outreach. The endangered palm Dypsis saintelucei, with only 300 mature individuals left, has been felled locally to build lobster traps for nearby hotels.

The reserve is private and managed by the Filana Association, which has run it since 2010; visits are arranged through the association rather than simply walked into. Volunteers carry out the conservation work, including lemur research, sea turtle monitoring, seed collecting, tree planting and community outreach.

Five lemur species live here, including the Sainte Luce mouse lemur which exists nowhere else on Earth. This isolated population makes the location scientifically important for understanding how species adapt in separate areas.