Winfred is in western Lake County, in the northwest part of Winfred Township. Its western boundary is the border with
Miner County.
U.S. Route 81 and
South Dakota Highway 34, running concurrently, form the northern border of the community. The two highways lead east to Madison, the
county seat, while to the west they divide a short distance into Miner County. US-81 leads south to
Interstate 90 south of
Salem, while SD-34 leads west to
Howard. According to the
U.S. Census Bureau, the Winfred CDP has an area of , of which , or 3.68%, are water. Lake Winfred is a natural water body northeast of the center of town. ==Demographics==