Elections to the New York State Senate took place on November 6, 2018. Primary elections were held September 13, 2018.
In April 2018, The Wall Street Journal described the State Senate as the "last bastion of power" of the Republican Party in the State of New York. On Election Day, Democrats gained control of the chamber from the Republicans by picking up eight seats. The following day, The New York Times wrote that the Democrats had "decisively evict[ed] Republicans from running the State Senate, which they [had] controlled for all but three years since World War II."
Enrolled Democrats won 40 of the chamber's 63 seats. Brooklyn Senator Simcha Felder, a Democrat who had previously caucused with the Republicans, sought to rejoin the Senate Democratic Conference, but was turned down. The Democrats' election victories made possible the January 2019 election of Andrea Stewart-Cousins as the first female Majority Leader and Temporary President in the chamber's history.
The six Democratic members of the IDC who were defeated in the September primaries (Sens. Avella, Peralta, Hamilton, Alcantara, Klein, and Valesky) were also on the ballot in November on either the Independence Party line, the Women's Equality Party line, or both (Sen. Peralta also received votes on the Reform Party line). With the exception of Sen. Avella, none publicly campaigned after being defeated on primary day. None of the six were re-elected.
Vote share of each candidate by main party per district. Candidates can run on multiple parties in New York; the shading is the sum of votes a candidate received for all parties, although only the main party is used for shading. Simcha Felder is considered a Democrat for purposes of this map.
The 3rd district is located on Long Island and includes Medford, Ronkonkoma, and Sayville. Republican Thomas Croci has represented this district since 2015. Croci did not run for reelection. Republican Assemblymember Dean Murray and Democrat Monica Martinez ran for election to this seat, and Martinez prevailed.
The 5th district is located on the North Shore of Long Island including Huntington and Oyster Bay. Republican Carl Marcellino has represented this district since a 1995 special election. After having nearly upset Marcellino in 2016, Democratic challenger Jim Gaughran challenged Marcellino again in 2018 and won.
The 6th district is located in western Long Island including Garden City, Hempstead, and Levittown. Republican Kemp Hannon has represented this district since a 1989 special election. In an unexpected upset, Democratic challenger Kevin Thomas defeated Hannon.
The 11th district is located in the northeast suburbs of Queens, including the neighborhoods of Bayside, College Point, and Little Neck. Democrat Tony Avella, a member of the former IDC, has represented this district since 2011. Avella was defeated by Liu in the Democratic primary, but remained in the race on third-party lines. On Election Day, Liu prevailed.
The 13th district is located in Queens, including the neighborhoods of Corona, East Elmhurst, and Jackson Heights. Democrat Jose Peralta, a member of the former IDC, has represented this district since a 2010 special election. Democratic challenger Jessica Ramos won the Democratic primary and the general election.
The 15th district includes the central neighborhoods of Queens, such as Middle Village & Ozone Park, and the western half of the Rockaway Peninsula. Democrat Joseph Addabbo Jr. has represented this district since 2009.
The 17th district is located in southwestern Brooklyn, including the neighborhoods of Borough Park, Kensington, and Midwood. Democrat Simcha Felder, a Democrat that has caucused with the Republicans from 2013 to 2018, has represented this district since 2013.
The 18th district includes the northern Brooklyn neighborhoods of Bushwick, Cypress Hills, and Williamsburg. Democrat Martin Malave Dilan has represented this district since 2013. He previously represented the 17th District from 2003-2012. Democrat Julia Salazar won the Democratic primary and the general election.
The 20th district is centered around the Brooklyn neighborhood of Crown Heights. It also includes parts of Brownsville and Sunset Park. Democrat Jesse Hamilton, a member of the former IDC, has represented this district since 2015. Democratic challenger Zellnor Myrie won the Democratic primary and the general election.
The 22nd district is located in southwestern Brooklyn, including Dyker Heights and Manhattan Beach. Republican Martin Golden has represented this district since 2003. Democratic challenger Andrew Gounardes defeated Ross Barkan in the Democratic primary and narrowly defeated Golden in the general election.
The 25th district includes the Brooklyn neighborhoods of Bedford–Stuyvesant and Red Hook. Democrat Velmanette Montgomery has represented this district since 1983. She previously represented the 18th District from 1993-2012 and the 22nd District from 1985-1992.
The 34th district includes the Bronx neighborhoods of Riverdale and Schuylerville, as well as some inner suburbs of New York City, including Pelham and parts of Mount Vernon. Democrat Jeff Klein, the leader of the former IDC, has represented this district since 2005. Democrat Alessandra Biaggi defeated Klein in the Democratic primary and won the general election.
The 35th district is located in the inner suburbs of New York City, including Greenburgh, Yonkers, and parts of New Rochelle. Democrat Andrea Stewart-Cousins, the Senate Minority Leader, has represented this district since 2007.
The 37th district is located in the New York City suburbs, including the towns of Bedford, Eastchester, Rye. Democrat Shelley Mayer has represented this district since winning a special election in April 2018.
The 38th district is located within the New York City suburbs of Briarcliff Manor and Clarkstown. Democrat David Carlucci, a former member of the Independent Democratic Conference (IDC), was first elected in 2010. Like other former IDC members, Carlucci received a Democratic primary challenge in 2018. After defeating Julie Goldberg in the primary, Carlucci turned back Republican Scott Vanderhoef in the general election.
The 40th district is located in the Hudson Valley, including Beekman, Carmel, and New Castle. Republican Terrence Murphy has represented this district since 2015. Murphy was challenged by Democrat Peter Harckham. As of November 8, Murphy had not conceded the race, and Harckham led Murphy by 2,121 votes. Harckham defeated Murphy by 3,834 votes.
The 41st district is located in the Hudson Valley, including Philipstown, Poughkeepsie, and Stanford. Republican Susan J. Serino has represented this district since 2015. As of November 8, Democratic candidate Karen Smythe had not conceded the race, although she trailed Serino by 2,146 votes. Smythe conceded on December 3, 2018.
The 49th district is located in the greater the Capital District and is centered around the outer Albany suburbs. It includes Malta and part of the City of Schenectady. The district also takes in the parts of North Country, such as rural areas of Hamilton County and Herkimer County. Republican Jim Tedisco was first elected to represent District 49 in 2016.
The 50th district is located within the Syracuse metropolitan area, including the Syracuse suburbs of Clay and Manlius, as well as a majority of Auburn. Republican John DeFrancisco has represented this district since 1993 and did not seek re-election. As of November 7, 2018, Republican Bob Antonacci led Democrat John Mannion by 2,829 votes and declared victory in the race, although absentee ballots remained to be counted. On November 21, 2018, elections officials confirmed Antonacci's victory.
The 53rd district is centered around Syracuse and the surrounding area including: Chittenango, Cicero, and Oneida. Democrat David Valesky, a member of the IDC, has represented this district since 2005. Democrat Rachel May defeated Valesky in the Democratic primary and won the general election.
The 61st district is primarily located within the Finger Lakes region, stretching from parts of Rochester to Batavia, Le Roy, and the outer Buffalo suburbs of Amherst and Clarence. Republican Michael Ranzenhofer has represented this district since 2009.
One question that remained after the election results came in was which caucus Democratic Senator Simcha Felder would join. Felder, since his first election in 2012, has been a member of the Republican majority, in order to deliver results to his heavily Jewish district, particularly education funding for yeshivas. After the dissolution of the Independent Democratic Conference and the rejoining of its seven members into the mainline caucus, Felder remained with the Republicans as the decisive vote for control. Felder maintained throughout his tenure that he would rejoin the Democrats if doing so would benefit his district, but after the overwhelming Democratic win in 2018, the Democratic conference disallowed him from joining the new majority.
^This figure includes Democratic Senator Simcha Felder, an enrolled Democrat who caucused with the Senate Republican Conference from 2013 to 2018.
^This figure does not include Senator Simcha Felder, an enrolled Democrat who caucused with the Senate Republican Conference from 2013 to 2018 and was barred from joining the Senate Democratic Conference in December 2018.
^The "SF" column refers to Senator Simcha Felder, an enrolled Democrat who caucused with the Senate Republican Conference from 2013 to 2018 and was barred from joining the Senate Democratic Conference in December 2018.