This study was performed to determine the benthic algae of Sarıkum Lagoon between October 2004 and July 2005. Samples were collected all around of the Lagoon. A total of 76 taxa belonging to Bacillariophyta, Chlorophyta, Cyanophyta and Euglenophyta divisions were identified in benthic flora. Rhopalodia gibba (Ehrenberg) O. Müller and Cocconeis placentula Ehrenberg var. euglypta Ehrenberg were found the most important taxa in the species composition of benthic flora.