Abstract: The present study deals with the general ecological study of periphytic algal community in terms of species composition and density of Dal lake. During the present study a total of 31 taxa belonging to 3 major classes namely Bacillarophyceae, Chlorophyceae and Cyanophyceae were recorded. The most common periphytic species encountered across all the study sites were Diatoma sp., Cymbella sp., Synedra sp., Fragillaria sp., Oedogonium sp., Tabellaria sp., Cosmarium sp., Scendesmus sp. and Oscillatoria sp. Among 31 species observed the maximum number of species were recorded at site 3 (Ruplank) followed by site 2 (Nishat basin) and at site 1 (Hazratbal basin) with equal number of species and site 4 (Gagribal basin). Bacillarophyceae dominated quantitavely at each site followed by Chlorophyceae and Cyanophyceae in terms of species richness. The overall percentage contribution in terms of population density of the three classes of periphytic algae at all the four studied sites were as, Bacillariophyceae 45%, Chlorophyceae 36% and Cyanophyceae 19%.