2017 New Jersey Senate election

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2017 New Jersey State Senate election

← 2013 November 7, 2017 2021 →
All 40 seats in the New Jersey Senate 21 seats needed for a majority
Majority party Minority party   Leader Steve Sweeney Thomas Kean Jr. Party Democratic Republican Leader since January 12, 2010 January 8, 2008 Leader's seat 3rd district (West Deptford) 21st district (Westfield) Last election 24 16 Seats won 25 15 Seat change 1 1 Popular vote 1,185,420 802,418 Percentage 59.5% 40.3% Swing 12.1% 11.8%
Results by district      Democratic hold      Democratic gain      Republican hold      Republican gain
Senate President before election Steve Sweeney Democratic Elected Senate President Steve Sweeney Democratic

Elections in New Jersey
Federal government U.S. President 1788-89 1792 1796 1800 1804 1808 1812 1816 1820 1824 1828 1832 1836 1840 1844 1848 1852 1856 1860 1864 1868 1872 1876 1880 1884 1888 1892 1896 1900 1904 1908 1912 1916 1920 1924 1928 1932 1936 1940 1944 1948 1952 1956 1960 1964 1968 1972 1976 1980 1984 1988 1992 1996 2000 2004 Dem 2008 Rep Dem 2012 2016 Dem 2020 Dem 2024 Rep U.S. Senate 1788 1790 1790 (sp) 1792 1796 1796 (sp) 1798 1799 (sp) 1801 (sp) 1803 (sp) 1804 1808 1809 1809 (sp) 1810 1815 1816 (sp) 1817 1820 1823 1823 (sp) 1826 1826 (sp) 1829 1829 (sp) 1833 1835 1839 1840 1845 1846 1851 1853 (sp) 1857 1858 1863 (sp) 1864 1866 (sp) 1867 (sp) 1869 1875 1877 1881 1883 1886 1889 1893 1895 1899 1901 1902 (sp) 1905 1907 1911 1913 1916 1918 1918 (sp) 1922 1924 1928 1930 1930 (sp) 1932 (sp) 1934 1936 1938 (sp) 1940 1942 1944 (sp) 1948 1954 1958 1960 1964 1966 1970 1972 1976 1978 1982 1984 1988 1990 1994 1996 2000 2002 2006 2008 2012 2013 (sp) 2014 2018 2020 2024 U.S. House of Representatives 1789 1791 1792 1794 1795 (sp AL) 1797 1798 1800 1803 1804 1806 1808 (sp AL) 1808 1810 (sp AL) 1810 1814 (sp 3rd) 1813 1814 1816 1818 1820 1821 (sp AL) 1822 1824 1826 1828 1828 (sp AL) 1830 1832 1834 1836 1836 1838 1840 1842 1844 1846 1850 1852 1854 1856 1858 1860 1862 1864 1866 1868 1870 1872 1874 1876 1878 1880 1882 1884 1886 1888 1890 1892 1894 1896 1898 1900 1902 1904 1906 1908 1910 1912 1913 (sp 6th) 1914 1916 1920 1924 1926 1928 1932 1934 1936 1938 1940 1942 1944 1948 1950 1951 (sp 9th) 1952 1954 1956 1958 1960 1968 1972 1980 1984 1988 1988 (sp 3rd) 1990 1990 (sp 1st) 1992 1994 1996 1998 2000 2002 2006 2006 (5th) 2006 (12th) 2008 2010 2012 2012 (sp 10th) 2014 2016 2018 2020 2022 2024
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The 2017 New Jersey State Senate elections were held on November 7, 2017, to elect Senators for all 40 legislative districts across New Jersey. These elections coincided with the election of Governor Phil Murphy. The winners of this election would serve in the 218th New Jersey Legislature, with seats apportioned based on the 2010 United States census. The Democratic Party grew its majority in the Senate, with incumbent Senate President Steve Sweeney re-elected to the top leadership post. Republican Thomas Kean, Jr. continued to lead his party as Minority Leader. This was the first state Senate election cycle in 10 years where any party flipped a Senate seat.

Democrats briefly held 26 seats from January through December 2019 following the party switch of Dawn Addiego, resulting in the Democrats controlling the highest percentage of seats since 1977. However, a 2019 special election in District 1 reduced the Democrats back to 25 seats.