Rajkumari Bibiji Amrit Kaur DStJ (née Ahluwalia; 2 February 1887 – 6 February 1964) was an Indian activist and politician. Following her long-lasting association with the Indian independence movement, she was appointed the first and the longest serving Health Minister of India in 1947 and remained in office until 1957. She also held the charge of Sports Minister and Urban Development Minister and was instrumental in setting up the National Institute of Sports, Patiala. During her tenure, Kaur ushered in several healthcare reforms in India and is widely remembered for her contributions to the sector and her advocacy of women's rights. Kaur was also a member of the Constituent Assembly of India, the body that framed the Constitution of India. She was the first Indian woman as a minister in central ministry.

Amrit Kaur was born on 2 February 1887 in Badshah Bagh, Lucknow University Campus, Lucknow, Uttar Pradesh (then North-Western Provinces), India. Kaur was born to Raja Sir Harnam Singh Ahluwalia the younger son of the Raja Randhir Singh of Kapurthala. Harnam Singh left Kapurthala following a conflict over succession to the throne, becoming the manager of estates in the former princely state of Oudh, Singh later married Chatterjee's daughter, Priscilla, and they had ten children, of which Amrit Kaur was the youngest, and their only daughter.

Kaur was raised as a Christian, and had her early education in Sherborne School for Girls in Dorset, England, and had her college education at Oxford University. After completing her education in England, she returned to India in 1918.

Kaur died in New Delhi on 6 February 1964. Although she was, at the time of her death, a practicing Christian, she was cremated according to family customs and her funeral was presided over by the SGPC. Kaur had never married, and had no children.

Today, her private papers are part of the Archives at the Nehru Memorial Museum & Library, at Teen Murti House, Delhi.

After her return to India from England, Kaur became interested in the Indian independence movement. Her father had shared close association with Indian National Congress leaders including Gopal Krishna Gokhale, who often visited them. Kaur was drawn to the thoughts and vision of Mahatma Gandhi, whom she met in Bombay (Mumbai) in 1919. Kaur worked as Gandhi's secretary for 16 years, and their correspondence was subsequently published as a volume of letters titled Letters to Rajkumari Amrit Kaur.

Following the Jallianwala Bagh massacre later that year, when the British forces shot and killed over 400 peaceful protestors in Amritsar, Punjab, Kaur became a strong critic of the British rule in India. She formally joined the Congress and began active participation in India's independence movement while also focusing on bringing about social reform. She was strongly opposed to the practice of purdah and to child marriage, and campaigned to abolish the devadasi system in India.

Kaur co-founded the All India Women's Conference in 1927. She was later appointed its secretary in 1930, and president in 1933. She was imprisoned by the British authorities for her participation in the Dandi March, led by Mahatama Gandhi in 1930. Kaur went to live at Gandhi's ashram in 1934 and adopted an austere lifestyle despite her aristocratic background.