South Lincoln is a census-designated place (CDP) within the town of Lincoln, Addison County, Vermont, United States.

[2] It is in eastern Addison County, in the south part of the town of Lincoln, in the valley of the New Haven River, a north-flowing tributary of Otter Creek and part of the Lake Champlain watershed.

It is bordered to the south and east by the Green Mountain National Forest.

South Lincoln Road leads north (downriver) 3 miles (5 km) to Lincoln, and Ripton Road leads southwest 9 miles (14 km) to Ripton.

The hottest temperature recorded in South Lincoln was 96 °F (35.6 °C) on September 1, 2010, while the coldest temperature recorded was −35 °F (−37.2 °C) on January 16–17, 1994 and January 27, 1994.