Ajmer State was a separate state within India from 1950 to 1956 with Ajmer as its capital. Ajmer State was formed in 1950 out of the territory of former province of Ajmer-Merwara, which became a province of the Indian Union on 15 August 1947. It formed an enclave within the state of Rajasthan. Following the States Reorganisation Act in 1956 it was merged with Rajasthan.

Ajmer State was formed out of territory of Ajmer-Merwara, which was a British controlled province during British India. The territory of Ajmer-Merwara had been purchased by British from the Marathas in 1818. Upon the independence of India, Ajmer-Merwara became a province of the Union of India.

It was a Province until it was established as a Class "C" State, named Ajmer State, on 26 January 1950 within Republic of India. Class "C" States were under direct rule of Central Government.

In 1956, when India's state boundaries were reorganised, it became a district of the then Rajasthan state. Ajmer state was merged into Rajasthan state on 1 November 1956. Kishangarh sub-division of erstwhile Jaipur district was added to it to form Ajmer district.

List of Chief Commissioners of Ajmer State:

No.	Name	Term
1	Shankar Prasada	1947–1948
2	Chandrakant Balwantrao Nagarkar	1948–1951
3	Anand Dattahaya Pandit	1952 – March 1954
4	Moti K. Kripalani	March 1954 – 31 October 1956

Haribhau Upadhyaya was the first and last Chief Minister of Ajmer State from 24 March 1952 until 1956.

No	Portrait	Name	Constituency	Tenure			Assembly Election	Party
1		Haribhau Upadhyaya	Shreenagar	24 March 1952	31 October 1956	4 years, 221 days	1st (1952)	Indian National Congress

• Ajmer
• History of Ajmer
• Haribhau Upadhyaya
• History of Rajasthan
• States Reorganisation Act, 1956
• 1952 Ajmer State Legislative Assembly election

26°27′N 74°38′E / 26.45°N 74.64°E / 26.45; 74.64