The Princely State of Kassalpura, also known as Kasalpura, was one of the native states of India that was administered by a native prince under the guidance of the British authorities. The princely state was under the indirect control of the British Empire in India. Kassalpura State covered a total area of 2 sq miles and comprised of a total population of 312 in the year 1941. The princely state of Kassalpura was located in the territory of Katosan Thana. The thana was contiguous to the taluka of Viragam in the British district of Ahmedabad, which was in northern Gujarat. It consisted of the jurisdictional taluka of Palaj and 9 non-jurisdictional estates. These estates are segregated into a number of complicated shares. Several villages were co-shared by different estates, including the state of Katosan itself. The estates were intertwined with the jurisdictional talukas of Palaj and Katosan. These regions were bounded by British India in the south and by Baroda on the rest of the 3 sides.

The thana was scattered over a total area of 35 sq miles and comprised of a total population of 13,325 in the year 1931. The Princely State of Kassalpura was incorporated as a part of the Baroda Agency, which was a sub division of the Western India States Agency. The state was also a part of the erstwhile Sabar Kantha Agency. Kassalpura state was under the administrative control of the Sadra Division and the Katosan Thana. Later the region was included as a part of the modern state of Gujarat.

The Princely State of Kassalpura was a non- jurisdictionary native state, which was under the administration of the shareholders. Kassalpura state was ranked as a 7th Class taluka, before the abolition of the class system in the year 1928. The former princely state was claimed by more than one monarchs, who held the official title of shareholders. The shareholders of the state of Kassalpura were Makwana Kolis, branches of Katosan. The estateholders were generally low in status and rather impoverished. The succession of the throne was not governed by the rule of primogeniture to any of their shares. Further more, many were under the management of Agency and owed gratitude and a lack of capability to manage their affairs without disagreement. The princely state of Kassalpura or Kasalpura paid annual tribute to Baroda. According to the Attachment Scheme of 1943, Kassalpura state was attached to Baroda in June, 1940, along with other petty states of Katosan Thana.

The Princely State of Kassalpura acceded the princely state to the Dominion of India, also known as Union of India, after the country gained independence from the British rule in the year 1947.