John Chun Yah Liu is an American politician in New York City. A member of the Democratic Party, he is a member of the New York State Senate for the 16th district in northeast Queens. He previously served as the 43rd New York City Comptroller from 2010 to 2013, and as a member of the New York City Council from 2002 to 2009, representing the 20th district in northeast Queens. He was the first Asian American New York City Council member and Comptroller, and one of the first two Asian American New York State Senators, as well as the first elected to legislative or citywide office in New York. He was also a candidate in the 2013 New York City mayoral election.

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.