Benbow was born in Manchester, England. He worked with William Cobbett on the radical newspaper The Political Register. Faced with being imprisioned for sedition he fled to the United States where he continued to work on the newspaper. Benbow was eventually tried for seditious libel and imprisioned in Cold Bath Field Prision in London. In 1831 he joined the National Union of the Working Classes. He was again tried to sedition in 1840, and he died in prison in 1841.