皋月杜鹃（学名：Rhododendron indicum）为杜鹃花科杜鹃花属下的一个种。

Rhododendron indicum is an Azalea Rhododendron species native to Japan (S & W Honshu, Shikoku, Kyushu, Yakushima). It is the type species for the Tsutsusi section and subsection, and was the original Tsutsusi described by Engelbert Kaempfer in Japan in 1712, from the Japanese name Kirishima-tsutsuji.