James Graham Fair (December 3, 1831 – December 28, 1894) was an Irish immigrant to the United States who became a highly successful mining engineer and businessman.
His investments in silver mines in Nevada made him a millionaire, and he was one of the famous "silver kings" who became wealthy on the Comstock Lode.
Fair later became a real estate investor and railroad builder in California.
In 1881, he was elected a United States Senator from Nevada.