Lake Dunlap is a census-designated place in Guadalupe County, Texas, United States.

The community is named after the former Lake Dunlap, a small reservoir on the Guadalupe River.

The repair was completed in August 2023, and the lake fully restored by the end of October that year.

Lake Dunlap is located along Farm to Market Road 725 in northwestern Guadalupe County, approximately eight miles northwest of Seguin.

The New Braunfels Independent School District (NBISD) serves students living in Lake Dunlap.