Mehr Chand Mahajan was born in 1889 at Tika Nagrota in the Kangra district of Punjab, British India (now In Himachal Pradesh). His father, Lala Brij Lal, was an advocate, who later established a reputed legal practice at Dharmsala. After completing middle school, Mahajan went to study in the Government College, Lahore, graduating in 1910. He enrolled in M.Sc. Chemistry, but switched to law following persuasion from his father. He earned an LL.B. degree in 1912.
Career as a lawyer
Mahajan started his career as a lawyer in 1913 in Dharamsala, where he spent a year practising. He spent the next four years (1914-1918) as a lawyer in Gurdaspur. He then practiced law in Lahore from 1918 to 1943. During his time there, he served as president of the High Court Bar Association of Lahore (1938 to 1943).
Prime Minister of Jammu and Kashmir
Mahajan visited Kashmir on invitation of the Maharani in September 1947 and was asked to be the Prime Minister of Jammu and Kashmir which he accepted. On 15 October 1947, Mahajan was appointed the Prime Minister of Jammu & Kashmir and played a role in the accession of the state to India. Jammu & Kashmir acceded to India in October 1947 and Mahajan thus became the 1st Prime Minister of the Indian state of Jammu and Kashmir, serving in that post until 5 March 1948.