|S.No.||Name of Group||States||Date of Integration|
|01.||Matsya Union||Alwar, Bharatpur, Dholpur, Karauli||17-03-1948|
|02.||Rajasthan Union||Banswara, Bundi, Dungerpur, Jhalawar, Kishangarh, Kota, Pratapgarh, Shahpura, Tonk.||25-03-1948|
|03.||United State of Rajasthan||Udaipur also joined with the other Union of Rajasthan.||18-04-1948|
|04.||Greater Rajasthan||Bikaner, Jaipur, Jaisalmer & Jodhpur also joined with the United State of Rajasthan.||30-03-1949|
|05.||United State of Greater Rajasthan||
Matsya Union also merged in Greater Rajasthan
18 States of United Rajasthan merged with Princely State Sirohi except Abu and Delwara.
Under the State Re-organisation Act, 1956 the erstwhile part C State of Ajmer, Abu Road Taluka, former part of princely State Sirohi which was merged in former Bombay, State and Sunel Tappa region of the former Madhya Bharat merged with Rajasthan and Sironj subdistrict of Jhalawar district was transferred to Madhya Pradesh.