Alfred David Benjamin (9 August 1848 – 8 January 1900) was an Australian born businessman and philanthropist.
Benjamin immigrated to Canada in 1873 and entered into the wholesale hardware business with his father's financial backing. He became a partner in M. and L. Samuel and Company and, after the death of Lewis Samuel in 1887, he became the leader of the company.
His success in a variety of business ventures allowed him to pursue various philanthropic goals. His most important contribution was to the Jewish community in Toronto. There he was the leader of the Holy Blossom Temple conregation and a major contributor to the new synagogue in 1897.