Susanna C. Larsson is a Swedish epidemiologist. She is Associate Professor at the Institute of Environmental Medicine at the Karolinska Institutet, Stockholm, Sweden. She is currently also associated with the Neurology Unit, University of Cambridge, where she is part of a group engaged in a study on the effect of diet on stroke risk.

Her research is aimed at improving the understanding of the etiology of cardiovascular disease and other major chronic diseases, using epidemiologic and genetic approaches.