Risto Sakari Alapuro, born 28 April 1944 in Ruokolahti, is a Finnish sociologist. He was a professor of sociology at University of Jyväskylä between 1986-1991, and a professor at Helsinki University from 1991 to 2010.
Alapuro is an internationally known social scientist who has focused on historical sociology in Finland. He has researched, studied and taught in France, Russia and the United States. He is specialized in social movements, political conflicts and social networks.
He wrote his doctoral dissertation Akateeminen Karjala-Seura in (1973). His other works include State and revolution in Finland (1988), which concerns the Finnish civil war, and Suomen synty paikallisena ilmiönä 1890-1933 (1994), which is about the birth of Finnish nationhood as a local phenomenon.
- Uppslagsverket Finland, 1 (2003)