Charles William Warner (19 October 1805 – 26/28 February 1887) was a Trinidadian lawyer who served as the Attorney General of Trinidad from 1845 to 1870. As attorney general he was considered the most powerful person in the colony after the governor. An angliciser who sought to make Trinidad more English, Warner played an important role in replacing the Spanish Law of the Indies in Trinidad with English law and in shaping education policy.