美洲肺鱼目（学名Lepidosireniformes）是肉鳍鱼纲的一目，特征为鳞片细小，胸鳍和腹鳍退化成细带，身体是鳗状。有两个对称的鳔。以浮游生物和小虾为食。只有两科，美洲肺鱼科和非洲肺鱼科。

Lepidosireniformes are an order of lungfish containing the families Lepidosirenidae (the South American lungfish) and Protopteridae (the African lungfish). Both of the two families are monogeneric, and the sole genus of the family Lepidosirenidae is also monospecific.