Several leaf spot diseases of Water hyacinth {Eichhornia crassipes (Mart.) Solms} were observed in the North Western and Western Provinces of Sri Lanka. Five pathogenic fungi capable of producing leaf spot were isolated. Of these, Myrothecium roridum and Cercospora piaropi have been previously recorded on Water hyacinth. The other isolates, namely, Curvularia tuberculata, Septofusidium elegantulum and Paeotrichoronis crotalariae were not previously recorded on Water hyacinth