Muslik-Mahmud I Begadha, Sultan of Gujarat, employed the Jats in the siege of Champaner (Chhota Udepur) in 1484, and granted the estate of Bajana with 24 villages to their leader Hadoji. The Jats subsequently conquered Mandal in Viramgam Taluqa from the Jhalas. They were allowed to retain several of its villages, although the Sultan took Mandal itself. When the Sardar of Bajana incurred the displeasure of the Mughal viceroy of Gujarat, the Latter resumed the grant of the Estate and ordered it partitioned among Jat maleks. Bajana was assigned to Hadoji (Haidar Khan), Valivada to Isaji. Isaji later conquered Warahi. Warahi was known as the senior Jatwad, and Bajana as the Junior Jatwad.
From 1921 to 1947 the ruler was entitled to elect a representative member of the Chamber of Princes. In 1948 his Privy Purse was set at Rs 65,500 a year.
At the time of merger the area of the State was 183 square miles, and the population (1941) 13,996. From 1943 to 1947 Bajana was attached to Baroda. Bajana is now in Surendranagar District.