Water hyacinth {Eichhornia crassipes (Mart.) Solms} which is believed to have been introduction to Sri Lanka as an ornamental plant, has now become a serious pest in waterways, ponds and slow running streams in the coastal districts of North Western, Western and the Southern Provinces. Local diseases of Water hyacinth have not been documented and there are no reports of pathogenic fungi isolated from Water hyacinth in country. This paper records the pathogenic and nonpathogenic fungi associated with leaf spots of Water hyacinth. It also reports three new leaf spots diseases of plant