Career
In 1917 he joined the Congress and participated in the civil disobedience and Khilafat Movement. From 1919 to 1923, he was President of the Sindh provincial Khilafat Committee and he served as Secretary and Treasurer of the Hilal-e-Ahmar Sindh Society from 8 October 1911. In 1920, Haroon started publishing First Rate (at Lloyd's) Waheed, a newspaper promoting ideas of independence.
The following year he encouraged Muhammad Wafai to publish Tawhid, a monthly journal which started a campaign against Syedism, Pirism and Mullaism and continued for next thirty years.
In 1921 he played host to Bi Amman, the mother of the Ali brothers, while they were being tried in Khaliq Deena Hall, Karachi. Between 1926 and 1942 he was elected thrice to the membership of the Central Legislative Assembly, gaining the second highest number of votes in all of Sindh, the highest number of votes being secured by Wahid Baksh Bhutto.
Haroon was president of the Khilafat Committee for 1927-1928 and attended the 1928 All Parties Conference as a member. He was knighted in the 1937 Coronation Honours list.
He donated ten thousand rupees to the League at Allahabad in 1942.
He was active in social welfare projects throughout his life. Abdullah Haroon died on 27 April 1942 in Karachi, Sindh. He was buried in mehwashah graveyard.