Gamaliel gə-MAIL-ee-ə is an unincorporated community and census-designated place in Baxter County, Arkansas, United States. Gamaliel is located along Arkansas Highway 101, 12 miles northeast of Mountain Home and 3 mi 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.