State legislature (United States) A state legislature in the United States is the legislative body of any of the 50 U.S. states. The formal name varies from state to state. In 25 states, the legislature is simply called the Legislature, or the State Legislature, while in 19 states, the legislature is called the General Assembly. In Massachusetts and New Hampshire, the legislature is called the General Court, while North Dakota and Oregon designate the legislature the Legislative Assembly.