Sadamitsu may refer to:
Places Sadamitsu, Tokushima, A former town in Tokushima, Japan. Now part of the town of Tsurugi, Tokushima Sadamitsu Station, A station in Tsurugi, Tokushima.
People Suganuma Sadamitsu, A Japanese samurai from Sengoku Era. Usui Sadamitsu, A Japanese warrior from the Mid-Heian Period.
Modern fictional characters Usui Sadamitsu, young female-warrior character in 2000s Otogizoshi (anime) Usui Sadamitsu, female-warrior character in Otogi 2: Immortal Warriors game
Arts Sadamitsu the Destroyer, A manga series by Masahiko Nakahira.