| Kazumi Ota | |
| Native Name Lang: | ja |
| Office: | Mayor of Kashiwa |
| Term Start: | 21 November 2021 |
| Predecessor: | Hiroyasu Akiyama |
| Office1: | Member of the House of Representatives |
| Constituency1: | Southern Kanto PR |
| Term Start1: | 19 December 2014 |
| Term End1: | 28 September 2017 |
| Constituency2: | Chiba 7th (2006–2009) Fukushima 2nd (2009–2012) |
| Term Start2: | 23 April 2006 |
| Term End2: | 16 November 2012 |
| Predecessor2: | Kazumi Matsumoto |
| Successor2: | Takumi Nemoto |
| Office3: | Member of the Chiba Prefectural Assembly |
| Constituency3: | Matsudo City |
| Term Start3: | 2005 |
| Term End3: | 2006 |
| Birth Date: | 28 August 1979 |
| Birth Place: | Kashiwa, Chiba, Japan |
| Party: | Independent |
| Otherparty: | DPJ PLF TPJ LP JIP DP Kibō no Tō Reiwa Shinsengumi |
| Alma Mater: | Nihon University |
is a Japanese politician who is the current mayor of Kashiwa. She has previously served as a member of the House of Representatives in the Diet (national legislature) from 2006 to 2012, and again from 2014 to 2017.
Kazumi Ota was elected to the Chiba Prefectural Assembly in 2005 and then to the House of Representatives for the first time in 2006 during special by-elections in Chiba 7th district. During 2009 general elections that marked DPJ's landslide victory, Ota was re-elected in Fukushima 2nd district. She lost in 2012 national elections, got elected in 2014 and lost again in 2017.[1]
She once worked as a hostess, which in the past would have likely ignited a scandal but has not presently done so.