Lac de Bettaniella (Corsican: Lavu à a Vetta Niella) is a lake in Corsica, France.

At an elevation of 2321 m, its surface area is 0.075 km².

In French, it is sometimes alternatively (and abusively) known as Lac de Bellebone or Lac du Rotondo.

It is the largest lake in Corsica.

This Haute-Corse geographical article is a stub.