Her Highness Rajmata Mehtab Kaur (b 14 September 1922), née Mohinder Kaur is the widow of His Late Highness Maharajadhiraj Yadavindra Singh of Patiala and the present Rajmata Sahiba Of Patiala, India. She is daughter of S. Harchand Singh Jaijee a member of the Riyasat Prajya Mandal.
Her Highness served as a member of Rajya Sabha, Upper House of Indian Parliament from 1964 to 1967 as a Congress (I) and then was elected to Lok Sabha, the Lower House in 1967.In 1977 she joined the Janta Party and became its general secretary. She served another term in Rajya Sabha from 1978 to 1984 as a Janta Party member. She has four children, namely (i) Maharaja Amarinder Singh(ii) Maharajkumar Malvendra Singh (iii) Maharajkumari Heminder Kaur and (iv) Maharajkumari Roopinder Kaur. She is mother-in-law of K. Natwar Singh who is married to Maharjkumari Heminder Kaur.
After independence she organised numerous camps in PEPSU for people who came from Western Punjab and also supervised medical provisions for them. Her Highness is an active social worker and currently resides in New Moti Bagh Palace, Patiala. She along with her husband His Highness Maharajadhiraj Yadavindra Singh worked tirelessly for people of PEPSU.