california_state_senate | ispartof | california_state_legislature <sep> the california state senate is the upper house of the california state legislature, the lower house being the california state assembly the state senate convenes, along with the state assembly, at the california state capitol in sacramento due to a combination of the state's large population and a legislature that has not been expanded since the ratification of the 1879 constitution, the state senate has the largest population per state senator ratio of any state legislative house in the united states house of representatives, california is apportioned 52 us representatives, each representing approximately 750,564 people, while in the california state senate, each of the 40 state senators represents approximately 931,349 people 
the senate in california is part of the california state legislature.the california state senate is the upper house of the california state legislature