Darmawan Mangunkusumo was an Indonesian economist and engineer who served as the Minister of Welfare between 1945 and 1946, within the First and Second Sjahrir Cabinets. Before his ministerial tenure, he worked as a government economic official in the Dutch and Japanese colonial governments, and was part of the Indonesian nationalist movement since his studies in the Netherlands through Perhimpoenan Indonesia.

The First Sjahrir Cabinet was the second Indonesian cabinet, named after the prime minister. It served from November 1945 to March 1946.