| Rajkumari Ratna Singh | |
| Birth Date: | 29 April 1959 |
| Birth Place: | New Delhi, India |
| Office: | Member of Parliament, Lok Sabha |
| Constituency1: | Pratapgarh |
| Term1: | 1996–1998 |
| Predecessor1: | Abhay Pratap Singh |
| Successor1: | Ram Vilas Vedanti |
| Constituency2: | Pratapgarh |
| Term2: | 1999–2004 |
| Predecessor2: | Ram Vilas Vedanti |
| Successor2: | Akshay Pratap Singh |
| Constituency3: | Pratapgarh |
| Term3: | 2009–2014 |
| Predecessor3: | Akshay Pratap Singh |
| Successor3: | Harivansh Singh |
| Party: | Indian National Congress (1995–2019) Bharatiya Janta Party (2019–present) |
| Children: | 2 |
| Parents: | Raja Dinesh Singh |
Rajkumari Ratna Singh (born 29 April 1959) is an Indian politician, daughter of former minister Dinesh Singh. She has been elected MP from Pratapgarh to Lok Sabha thrice as from Congress party in 1996, 1999 and 2009. But after coming third in two consecutive Lok Sabha election (2014 and 2019) on Congress ticket, she left to join Bharatiya Janata Party in October 2019.[1]
She had won from Pratapgarh in 1999, but lost the 2004 elections to Akshay Pratap Singh alias Gopalji, Ratna and Raghuraj Pratap Singh are both related to the but hail from different branches.[2]
Ratna Singh regained the Pratapgarh constituency in the 2009 Indian general elections, defeating her nearest Samajwadi Party rival Prof. Shivakant Ojha, by over 30,000 votes.[3] Akshay Pratap Singh came in third, and fourth was the noted criminal-politician Ateeq Ahmed who was fighting the elections from prison. Partly, her victory has been attributed to a re-allocation of the boundaries of the electoral district, whereby Raja Bhaiya's Kunda district was re-apportioned to a separate area.[4]
Subsequently, in the 2014 Indian general elections she was defeated by Harivansh Singh of Apna Dal.
She is the youngest daughter of former Minister of External Affairs Dinesh Singh. She is married to Jaisingh Sisodia of Pratapgarh, Rajasthan.[5] The couple have a son, Bhuvanyu Singh and a daughter Tanushree Kumari.