Hawaii has sent congressional delegations to the United States Senate and House of Representatives since it became a U.S. state in 1959. Before becoming a state, the Territory of Hawaii elected a non-voting delegate at-large to Congress from 1888 to 1958. The longest-serving senator was Daniel Inouye, from 1963 to 2012—he served as President pro tempore of the United States Senate from 2010 to 2012 as the longest-serving senator. Patsy Mink was the first woman of color to serve in the House, and the first woman to represent Hawaii in Congress. The current dean of the Hawaii delegation is Mazie Hirono, having served in the Senate since 2013 and in Congress since 2007. (Full list...)