The state government of Hawaii is modeled after the federal government with adaptations originating from the kingdom era of Hawaiian history. As codified in the Constitution of Hawai‘i, there are three branches of government: executive, legislative and judicial. The executive branch is led by the state governor who oversees the major agencies and departments. The legislative body consists of the 25-member Hawai‘i State Senate and the 51-member Hawai‘i State House of Representatives. The judicial branch is led by the highest state court, the Hawai‘i State Supreme Court. Lower courts are organized as the Hawai‘i State Judiciary.
Unique to Hawai‘i is the way it has organized its municipal governments. There are no incorporated cities in Hawai‘i except the City & County of Honolulu. All other municipal governments are administered at the county level.
Hawaii is the only state that does not have a Department of Motor Vehicles or a Registry of Motor Vehicles. Vehicle registration and driver licensing are performed by county governments.