Leaf spot commonly refers to:
- Leaf spot, caused by Alternaria alternata a fungus with a wide variety of plant hosts.
- Alternaria leaf spot of Cucurbits, caused by Alternaria alternata f.sp. cucurbitae.
Leaf spot may also refer to:
- Septoria leaf spot, caused by Septoria lycopersici
- White leaf spot, caused by Pseudocercosporella spp.
- Brassica dark leaf spot, caused by Alternaria brassicicola a fungus of Brassicas
- Grey leaf spot, caused by Alternaria brassicae) a fungus of Brassicas
- Black leaf spot (Brassica), caused by Alternaria raphani a fungus of Brassicas