Kauai County operates under a
mayor-council form of municipal government. The
Mayor of Kauai, elected by the voters on a nonpartisan basis, holds executive authority for a four-year term. Meanwhile, legislative authority is vested in the seven-member County Council. Members of the County Council are elected on a nonpartisan, at-large basis to two-year terms.
United States Congress Kauai County, like the rest of Hawaii, is represented entirely by
Democrats in both the
United States Senate and the
United States House of Representatives.
Hawaii Legislature Hawaii Senate Hawaii House of Representatives Elections Kauai County, like Hawaii in general, has traditionally been a stronghold of the
Democratic Party. The county has not voted for a
Republican presidential candidate since
1984, when it narrowly voted in favor of
Ronald Reagan. In
2024, while it still voted majority Democratic, Kauai County cast the highest percentage for the Republican candidate of any county in the state, a distinction that has generally been held by Honolulu County; this was the first time Kauai County had done so since 1960. The island of Kauai leans Democratic overall. The island of Ni'ihau, which has a very small population, tends to vote almost entirely Republican, by far the strongest such leaning of all major Hawaiian islands. ==Sister cities==