Högsjö is a locality in Vingåker Municipality, in Södermanland County, Sweden. Högsjö lies at 76 m above sea level. It has 606 inhabitants (2023). The nearest city is Katrineholm, 31 km to the east. Among the landmarks around are Västra Vingåker Church (12.3 km), Skedevi Church (15.7 km) and Bo Church (14.3 km).