Jacob Aall (27 July 1773 – 4 August 1844) was a Norwegian politician, historian, landowner and government economist.

He was born the son of Nicolai Benjamin Aall (1739-1798), who was a merchant in Porsgrunn, Norway and owner of Ulefos Manor.

Following his father's death, he invested his patrimony in the purchase of the immense Nes Iron-works in the Arendal ore region.

In 1814 he took a prominent part in the framing of the free Constitution of Norway, and for fourteen years (1816-1830), he was a leading member of the Storting, the Norwegian National Assembly.

In his later years, Aall increasingly withdrew from public life, and left most of the work at the iron-works to his son.