Gamaliel is an unincorporated community in Baxter County, Arkansas, United States. Gamaliel is located along Arkansas Highway 101, 12 miles (19 km) northeast of Mountain Home and 3 mi (4.8 km) south of the Arkansas—Missouri border. Gamaliel has a post office with ZIP code 72537.
Gamaliel is located on a ridge between Bennetts Bayou to the east and the Norfork River/Norfork Lake to the west. Gamaliel campground on the east arm of Norfork Lake is about three miles to the southeast.