The New York State Senate is the upper house of the New York State Legislature, while the New York State Assembly is its lower house. Established in 1777 by the Constitution of New York, its members are elected to two-year terms with no term limits. There are 63 seats in the Senate. The Democratic Party has held control of the New York State Senate since 2019. The Senate Majority Leader is Andrea Stewart-Cousins.

The New York State Legislature consists of the two houses that act as the state legislature of the U.S. state of New York: the New York State Senate and the New York State Assembly. The Constitution of New York does not designate an official term for the two houses together; it says only that the state's legislative power "shall be vested in the senate and assembly". Session laws passed by the Legislature are published in the official Laws of New York. Permanent New York laws of a general nature are codified in the Consolidated Laws of New York. As of January 2021, the Democratic Party holds supermajorities in both houses of the New York State Legislature, which is the highest paid state legislature in the country.