James Edward Cahill (15 April 1903 – 21 August 1978) was an Australian politician and a member of the New South Wales Legislative Assembly for one term from 1953 until 1956.

Cahill was born in the farming community of Blackville near Quirindi, New South Wales and was the son of a schoolteacher.

Educated at Tamworth High School, Jim Cahill qualified as a licensed pharmacist.

He owned a chemist's shop in Armidale and became involved in community organisations including Lions and the Chamber of Commerce.

Armidale was usually considered unwinnable for Labor but the result reflected the solid swing to the party at that election.