Seven new species of Oedogonium growing epiphytically on different species of Chara, Nitella and Oryza rufipogon are reported from Bangladesh. These are Oedogonium gracillimum Wittr. & Lund. Hirn 1874 f. gracillimum Tiffany1930, Oedogonium regium Hughes, 1948, Oedogonium pygmaeum Gonz. & Jain, 1968, Oedogonium obtruncatum, Wittr., 1874 var. obtruncatum, 1939, Oedogonium gunnii Wittr. Hirn., 1874 var. breviarticulatum Jao, 1937, Oedogonium oblongellum Kirch ex Hirn., 1900 var. oblongellum Gem., 1939, Oedogonium thanense Gonz. & Jain, 1970