Martell (formerly, Oneida) is an unincorporated community in Amador County, California, United States. It is located 1.5 miles (2.4 km) northwest of Jackson, at an elevation of 1486 feet. Its population is either in the double or triple digits. Martell is located west of Jackson and east of Ione, by which it is connected by the Amador Central Railroad. Martell is where the major retail outlets for Amador County are located, including Kmart, Wal-Mart, and Lowe's in a shopping center. McDonald's, Burger King, Strings Italian Cafe, Starbucks, Baskin Robbins, Jack In The Box and Subway are restaurant chains in town. The community is in ZIP code 95654 and area code 209. Martell's only fitness club is Anytime Fitness, which is Amador County's only 24-hour gym.