Kinzanji, Buddhist temple in Okayama, Japan.

Kinzanji is a Tendai temple on Mount Meikin in the Kinzanji district of Kita-ku, Okayama, founded in 749 by Hōon Daishi. Its main image is a thousand-armed Kannon. The main hall, rebuilt in 1575 with support from Ukita Naoie, burned down on 24 December 2012; the Goma-dō from the same rebuilding, donated by Ukita Naoie, and a three-storey pagoda built in 1788 by carpenter Tabuchi Shigekazu of Sukumo still stand.

According to the temple's 15th-century origin legend, the monk Hōon founded Kinzanji in 749 on Mount Sangō behind the present site, and it later became the head of 48 temples he established in Bizen. It burned in 1069 and was moved to its current location in 1142. In the 1169–1170s the returning monk Eisai built a goma hall and converted it to the Tendai school; in 1501 the Matsuda clan burned it for refusing to convert to Nichiren Buddhism, and the main hall was rebuilt in 1575 with support from Ukita Naoie, only to burn down again in 2012.

Each year on the first Saturday of February the temple holds the Kinzanji Eyo, a rite said to have been performed for 600 years. The temple is dedicated to Senju Kannon, and its name is read Kanayama-ji in the local place name. The temple documents, including the Kinzanji Monjo and the Kinzan Kannonji Engi, are a National Important Cultural Property.

Kinzanji is reached from JR Tsuyama Line Tamagashi Station, about 10 minutes by car; the temple stands in the Kanayama district of Kita Ward, Okayama. The approach climbs to the hillside site where the main hall was rebuilt after the 2012 fire.

The temple keeps a set of documents, the Kinzanji monjo, comprising 52 letters and records from the Heian to Muromachi periods plus one scroll of origin legends, designated a National Important Cultural Property in 1969. Many concern temple lands. A gong dated 1374 also survives.