Carolyn Judith Hewson AO (née Somerville; born July 1955) is an Australian business woman. She studied at the University of Adelaide and at the University of Cambridge. She is a Director of BHP YWCA, the NeuroSurgical Research Foundation, and the Breast Cancer Research Foundation. She has previously held top executive positions with Schroders Australia Limited; BT Investment Management Limited, Westpac Banking Corporation, AMP Limited, CSR Limited, AGL Energy Limited, the Australian Gas Light Company, SA Water, and the Economic Development Board of South Australia.