Ala Singh was the first Maharaja of Patiala. His rule coincides with the period from 1761 to 1765.
Amar Singh was the 2nd Maharaja of Patiala from 1765 to 1767. He ruled Patiala under the title of Raja-e-Rajgan from 1767 to 1781.
Sahib Singh ruled Patiala under the title of Raja-e-Rajgan from 1781 to 1810. He ruled Patiala under the title of Maharaja-e Rajgan from 1810 to 1813. In 1810, he was granted the title of Maharaja by Badshah Akbar II of Delhi.
Karam Singh ruled Patiala as the Maharaja-e Rajgan from 1813 to 1845. Singh is known to provide aid to the British in 1814 in checking Gurkha incursions into the Punjab hills and secured in return a large tract in the Himalayan foothills. He is credited with the construction of shrines in honor of the Gurus at many historical sites within his state and outside and making endowments for their maintenance.
Narendra Singh ruled Patiala as the Maharaja-e Rajgan from 1845 to 1862.
Mahendra Singh ruled Patiala as the Maharaja-e Rajgan from 1862 to 1876. Singh is credited with development in Patiala. He funded colleges and a new canal and provided relief in famine-stricken areas. He is the founder of Mohindra College in Patiala, which is named after him.
Rajinder Singh ruled Patiala as the Maharaja-e Rajgan from 1876 to 1900. The colonial government awarded the Grand Cross of the Star of India to Rajinder Singh for his bravery in 1897. He is credited with the implementation of reforms. More specifically, he made endowments for a woman's hospital, orphanages and training of troops. He played polo, cricket, field hockey and English billiards.
Bhupinder Singh ruled Patiala as the Maharaja-e Rajgan from1900 to 1938. He was a sportsman and represented India at the League of Nations in 1925 and at the Round Table Conference. He is credited with the construction of buildings with bold architectural designs in Patiala like the Kali Temple and the Chail View Palace.
Yadavindra Singh ruled Patiala as the Maharaja-e Rajgan from 1938 to 1947. He agreed to merge his state with India on 5th of May, 1948. He was Rajpramukh of the new Indian state of Patiala and East Punjab States Union until it was merged with Punjab in 1956.