| Ōta Masahiro | |
| Native Name: | 太田 政弘 |
| Native Name Lang: | ja |
| Office: | Governor General of Taiwan |
| Primeminister: | Hamaguchi Osachi Wakatsuki Reijirō |
| Term Start: | 16 January 1931 |
| Term End: | 2 March 1932 |
| Predecessor: | Ishizuka Eizō |
| Successor: | Minami Hiroshi |
| Office2: | Governor-General of Kwantung |
| Primeminister2: | Hamaguchi Osachi |
| Term Start2: | 17 August 1929 |
| Term End2: | 16 January 1931 |
| Predecessor2: | Kinoshita Kenjiro |
| Successor2: | Tsukamoto Seiji |
| Birth Date: | 16 November 1871 |
| Birth Place: | Yamagata Prefecture, Japan |
| Nationality: | Japanese |
| Party: | Minseitō |
was the 14th Governor-General of Taiwan (1931–1932).[1] He was Governor of Fukushima Prefecture (1913–1915), Ishikawa Prefecture (1915–1916), Kumamoto Prefecture (1916–1919), Niigata Prefecture (1919–1923) and Aichi Prefecture (1923–1924). He was a graduate of the University of Tokyo.