Pemigewasset Lake is a 256-acre water body located in the Lakes Region of central New Hampshire in the United States. The lake straddles the border between the towns of New Hampton and Meredith, both in Belknap County. Outflow from the lake travels down Harper Brook to the Pemigewasset River, a tributary of the Merrimack River, which flows to the Gulf of Maine.
Summer camps, private residences, and a campground line the northern side of the lake, while the southern shoreline is less developed. NH Route 104 runs past the north shore of the lake. A private area called "Smoke Rise" lies on the western side of the lake. The primary road, Smoke Rise Rd., and a smaller secondary road, Easy Street, are located in this area. Smoke Rise borders the southwest side of Pemi Shores, a popular local campground.