Stuart Jay Olshansky (born February 22, 1954) is a professor in the School of Public Health at the University of Illinois at Chicago concentrating on biodemography and gerontology and is co-founder and Chief Scientist at Lapetus Solutions, Inc. He is also a research associate at the Center on Aging (University of Chicago) and at the London School of Hygiene and Tropical Medicine. Olshansky is an associate editor of the Journal of Gerontology: Biological Sciences and Biogerontology and is a member of the editorial boards of several other scientific journals.