Thomas Vincent Miller Jr. (December 3, 1942 – January 15, 2021), known as Mike Miller, was an American politician from Maryland. He had been a state senator representing the 27th District (Calvert, Charles, and Prince George's Counties) from 1975 to 2020 and served as its President from 1987 to 2020. He was the longest-serving President of the Maryland Senate, and was for a period the longest-serving state senate president in the United States.