Sant Miquel de Campmajor is a municipality and village in the province of Girona, in the autonomous community of Catalonia, Spain. It lies in the comarca of Pla de l'Estany, at coordinates approximately 42°8′15″N 2°40′48″E.
The municipality covers an area of 33.2 square kilometres (12.8 square miles). Its population was recorded as 232 in 2014, and 258 as of 1 January 2025. The village's parish church is among its notable features.
Josep Fort Olivella has served as mayor, holding the office in 2015. The municipality's website is santmiqueldecampmajor.cat.