California's State Assembly districts are numbered 1 through 80. The California State Assembly is the lower house of the California State Legislature. There are 80 members to the Assembly, representing an equal amount of constituencies, with each district having a population of at least 420,000 citizens. Due to the state's large population and relatively small legislature, the Assembly has the largest population per representative ratio of any lower house legislature in the United States; only the federal U.S. House of Representatives has a larger ratio. Since a referendum in 1990, members to the Assembly are limited by term limits, limiting members to three two-year terms (six years).