Lough Anaserd () is a freshwater lake in the west of Ireland. It is located in west County Galway on the Slyne Head peninsula.
Lough Anaserd is about south of Clifden, near Ballyconneely. The lake has numerous rocky islands and is oligotrophic.
Lough Anaserd is home to the slender naiad (Najas flexilis), a rare plant species. The lake is part of the Slyne Head Peninsula Special Area of Conservation.