# List of United States senators from New Jersey

This is a chronological listing of the United States senators from New Jersey. Since the enforcement of the Seventeenth Amendment to the United States Constitution, U.S. senators are popularly elected for a six-year term beginning January 3. Elections are held the first Tuesday after November 1. Before 1914, they were chosen by the New Jersey Legislature, and before 1935, their terms began March 4. The state's current senators are Democrats Cory Booker (serving since 2013) and Andy Kim (serving since 2024). Frank Lautenberg was New Jersey's longest-serving senator (1982–2001; 2003–2013).

## List of senators

| Class 1Class 1 U.S. senators belong to the electoral cycle that has recently been contested in 2006, 2012, 2018, and 2024. The next election will be in 2030. | Class 1Class 1 U.S. senators belong to the electoral cycle that has recently been contested in 2006, 2012, 2018, and 2024. The next election will be in 2030. | Class 1Class 1 U.S. senators belong to the electoral cycle that has recently been contested in 2006, 2012, 2018, and 2024. The next election will be in 2030. | Class 1Class 1 U.S. senators belong to the electoral cycle that has recently been contested in 2006, 2012, 2018, and 2024. The next election will be in 2030. | Class 1Class 1 U.S. senators belong to the electoral cycle that has recently been contested in 2006, 2012, 2018, and 2024. The next election will be in 2030. | Class 1Class 1 U.S. senators belong to the electoral cycle that has recently been contested in 2006, 2012, 2018, and 2024. The next election will be in 2030. | C | Class 2Class 2 U.S. senators belong to the electoral cycle that has recently been contested in 2008, 2013 (special election), 2014, and 2020. The next election will be in 2026. | Class 2Class 2 U.S. senators belong to the electoral cycle that has recently been contested in 2008, 2013 (special election), 2014, and 2020. The next election will be in 2026. | Class 2Class 2 U.S. senators belong to the electoral cycle that has recently been contested in 2008, 2013 (special election), 2014, and 2020. The next election will be in 2026. | Class 2Class 2 U.S. senators belong to the electoral cycle that has recently been contested in 2008, 2013 (special election), 2014, and 2020. The next election will be in 2026. | Class 2Class 2 U.S. senators belong to the electoral cycle that has recently been contested in 2008, 2013 (special election), 2014, and 2020. The next election will be in 2026. | Class 2Class 2 U.S. senators belong to the electoral cycle that has recently been contested in 2008, 2013 (special election), 2014, and 2020. The next election will be in 2026. |
| # | Senator | Party | Dates in office | Electoral history | T | C | T | Electoral history | Dates in office | Party | Senator | # |
| 1 | Jonathan Elmer | Pro- Admin. | Mar 4, 1789 – Mar 3, 1791 | Elected in 1788. | 1 | 1st | 1 | Elected in 1788.Resigned to become New Jersey Governor. | Mar 4, 1789 – Nov 13, 1790 | Pro- Admin. | William Paterson | 1 |
| 1 | Jonathan Elmer | Pro- Admin. | Mar 4, 1789 – Mar 3, 1791 | Elected in 1788. | 1 | 1st | 1 | | Nov 13, 1790 – Nov 23, 1790 | Vacant | Vacant | Vacant |
| 1 | Jonathan Elmer | Pro- Admin. | Mar 4, 1789 – Mar 3, 1791 | Elected in 1788. | 1 | 1st | 1 | Elected to finish Paterson's term.Retired. | Nov 23, 1790 – Mar 3, 1793 | Pro- Admin. | Philemon Dickinson | 2 |
| 2 | John Rutherfurd | Pro- Admin. | Mar 4, 1791 – Dec 5, 1798 | Elected in 1790. | 2 | 2nd | 1 | Elected to finish Paterson's term.Retired. | Nov 23, 1790 – Mar 3, 1793 | Pro- Admin. | Philemon Dickinson | 2 |
| 2 | John Rutherfurd | Pro- Admin. | Mar 4, 1791 – Dec 5, 1798 | Elected in 1790. | 2 | 3rd | 2 | Elected in 1792 or 1793.Resigned. | Mar 4, 1793 – Nov 12, 1796 | Pro- Admin. | Frederick Frelinghuysen | 3 |
| 2 | John Rutherfurd | Federalist | Mar 4, 1791 – Dec 5, 1798 | Elected in 1790. | 2 | 4th | 2 | Elected in 1792 or 1793.Resigned. | Mar 4, 1793 – Nov 12, 1796 | Federalist | Frederick Frelinghuysen | 3 |
| 2 | John Rutherfurd | Federalist | Mar 4, 1791 – Dec 5, 1798 | Elected in 1790. | 2 | 4th | 2 | Elected to finish Frelinghuysen's term.Retired. | Nov 12, 1796 – Mar 3, 1799 | Federalist | Richard Stockton | 4 |
| 2 | John Rutherfurd | Federalist | Mar 4, 1791 – Dec 5, 1798 | Re-elected in 1796.Resigned. | 3 | 5th | 2 | Elected to finish Frelinghuysen's term.Retired. | Nov 12, 1796 – Mar 3, 1799 | Federalist | Richard Stockton | 4 |
| 3 | Franklin Davenport | Federalist | Dec 5, 1798 – Mar 3, 1799 | Appointed to continue Rutherfurd's term. | 3 | 5th | 2 | Elected to finish Frelinghuysen's term.Retired. | Nov 12, 1796 – Mar 3, 1799 | Federalist | Richard Stockton | 4 |
| 4 | James Schureman | Federalist | Mar 4, 1799 – Feb 16, 1801 | Elected to finish Rutherfurd's term.Resigned. | 3 | 6th | 3 | Elected in 1798.Lost re-election. | Mar 4, 1799– Mar 3, 1805 | Federalist | Jonathan Dayton | 5 |
| Vacant | Vacant | Vacant | Feb 16, 1801 – Feb 28, 1801 | | 3 | 6th | 3 | Elected in 1798.Lost re-election. | Mar 4, 1799– Mar 3, 1805 | Federalist | Jonathan Dayton | 5 |
| 5 | Aaron Ogden | Federalist | Feb 28, 1801 – Mar 3, 1803 | Elected to finish Rutherfurd's term.Lost re-election. | 3 | 6th | 3 | Elected in 1798.Lost re-election. | Mar 4, 1799– Mar 3, 1805 | Federalist | Jonathan Dayton | 5 |
| 5 | Aaron Ogden | Federalist | Feb 28, 1801 – Mar 3, 1803 | Elected to finish Rutherfurd's term.Lost re-election. | 3 | 7th | 3 | Elected in 1798.Lost re-election. | Mar 4, 1799– Mar 3, 1805 | Federalist | Jonathan Dayton | 5 |
| Vacant | Vacant | Vacant | Mar 4, 1803 – Sep 1, 1803 | Legislature failed to elect. | 4 | 8th | 3 | Elected in 1798.Lost re-election. | Mar 4, 1799– Mar 3, 1805 | Federalist | Jonathan Dayton | 5 |
| 6 | John Condit | Democratic- Republican | Sep 1, 1803 – Mar 3, 1809 | Appointed to begin the vacant term.Elected in 1803 to finish the vacant term.Lost renomination. | 4 | 8th | 3 | Elected in 1798.Lost re-election. | Mar 4, 1799– Mar 3, 1805 | Federalist | Jonathan Dayton | 5 |
| 6 | John Condit | Democratic- Republican | Sep 1, 1803 – Mar 3, 1809 | Appointed to begin the vacant term.Elected in 1803 to finish the vacant term.Lost renomination. | 4 | 9th | 4 | Elected in 1804.Resigned. | Mar 4, 1805 – Mar 12, 1809 | Democratic- Republican | Aaron Kitchell | 6 |
| 6 | John Condit | Democratic- Republican | Sep 1, 1803 – Mar 3, 1809 | Appointed to begin the vacant term.Elected in 1803 to finish the vacant term.Lost renomination. | 4 | 10th | 4 | Elected in 1804.Resigned. | Mar 4, 1805 – Mar 12, 1809 | Democratic- Republican | Aaron Kitchell | 6 |
| 7 | John Lambert | Democratic- Republican | Mar 4, 1809 – Mar 3, 1815 | Elected in 1808.Lost re-election. | 5 | 11th | 4 | Elected in 1804.Resigned. | Mar 4, 1805 – Mar 12, 1809 | Democratic- Republican | Aaron Kitchell | 6 |
| 7 | John Lambert | Democratic- Republican | Mar 4, 1809 – Mar 3, 1815 | Elected in 1808.Lost re-election. | 5 | 11th | 4 | | Mar 12, 1809 – Mar 21, 1809 | Vacant | Vacant | Vacant |
| 7 | John Lambert | Democratic- Republican | Mar 4, 1809 – Mar 3, 1815 | Elected in 1808.Lost re-election. | 5 | 11th | 4 | Appointed to continue Kitchell's termElected in 1809 to finish Kitchell's term. | Mar 21, 1809 – Mar 3, 1817 | Democratic- Republican | John Condit | 7 |
| 7 | John Lambert | Democratic- Republican | Mar 4, 1809 – Mar 3, 1815 | Elected in 1808.Lost re-election. | 5 | 12th | 5 | Re-elected in 1810. | Mar 21, 1809 – Mar 3, 1817 | Democratic- Republican | John Condit | 7 |
| 7 | John Lambert | Democratic- Republican | Mar 4, 1809 – Mar 3, 1815 | Elected in 1808.Lost re-election. | 5 | 13th | 5 | Re-elected in 1810. | Mar 21, 1809 – Mar 3, 1817 | Democratic- Republican | John Condit | 7 |
| 8 | James J. Wilson | Democratic- Republican | Mar 4, 1815 – Jan 8, 1821 | Elected in 1815.Lost re-election, resigned early. | 6 | 14th | 5 | Re-elected in 1810. | Mar 21, 1809 – Mar 3, 1817 | Democratic- Republican | John Condit | 7 |
| 8 | James J. Wilson | Democratic- Republican | Mar 4, 1815 – Jan 8, 1821 | Elected in 1815.Lost re-election, resigned early. | 6 | 15th | 6 | Elected in 1817. | Mar 4, 1817 – Jan 30, 1829 | Democratic- Republican | Mahlon Dickerson | 8 |
| 8 | James J. Wilson | Democratic- Republican | Mar 4, 1815 – Jan 8, 1821 | Elected in 1815.Lost re-election, resigned early. | 6 | 16th | 6 | Elected in 1817. | Mar 4, 1817 – Jan 30, 1829 | Democratic- Republican | Mahlon Dickerson | 8 |
| Vacant | Vacant | Vacant | Jan 8, 1821 – Jan 26, 1821 | | 6 | 16th | 6 | Elected in 1817. | Mar 4, 1817 – Jan 30, 1829 | Democratic- Republican | Mahlon Dickerson | 8 |
| 9 | Samuel L. Southard | Democratic- Republican | Jan 26, 1821 – Mar 3, 1823 | Appointed to finish Wilson's term, having been elected to the next term. | 6 | 16th | 6 | Elected in 1817. | Mar 4, 1817 – Jan 30, 1829 | Democratic- Republican | Mahlon Dickerson | 8 |
| 9 | Samuel L. Southard | Democratic- Republican | Jan 26, 1821 – Mar 3, 1823 | Elected in 1820.Resigned to become U.S. Secretary of the Navy. | 7 | 17th | 6 | Elected in 1817. | Mar 4, 1817 – Jan 30, 1829 | Democratic- Republican | Mahlon Dickerson | 8 |
| Vacant | Vacant | Vacant | Mar 4, 1823 – Nov 12, 1823 | | 7 | 18th | 7 | Re-elected in 1823.Resigned and immediately re-elected for the class 1 seat. | Mar 4, 1817 – Jan 30, 1829 | Democratic- Republican | Mahlon Dickerson | 8 |
| 10 | Joseph McIlvaine | Democratic-Republican | Nov 12, 1823 – Aug 19, 1826 | Elected to finish Southard's term.Died. | 7 | 18th | 7 | Re-elected in 1823.Resigned and immediately re-elected for the class 1 seat. | Mar 4, 1817 – Jan 30, 1829 | Democratic- Republican | Mahlon Dickerson | 8 |
| 10 | Joseph McIlvaine | National Republican | Nov 12, 1823 – Aug 19, 1826 | Elected to finish Southard's term.Died. | 7 | 19th | 7 | Re-elected in 1823.Resigned and immediately re-elected for the class 1 seat. | Mar 4, 1817 – Jan 30, 1829 | Jacksonian | Mahlon Dickerson | 8 |
| Vacant | Vacant | Vacant | Aug 19, 1826 – Nov 10, 1826 | | 7 | 19th | 7 | Re-elected in 1823.Resigned and immediately re-elected for the class 1 seat. | Mar 4, 1817 – Jan 30, 1829 | Jacksonian | Mahlon Dickerson | 8 |
| 11 | Ephraim Bateman | National Republican | Nov 10, 1826 – Jan 12, 1829 | Elected to finish Southard's term. | 7 | 19th | 7 | Re-elected in 1823.Resigned and immediately re-elected for the class 1 seat. | Mar 4, 1817 – Jan 30, 1829 | Jacksonian | Mahlon Dickerson | 8 |
| 11 | Ephraim Bateman | National Republican | Nov 10, 1826 – Jan 12, 1829 | Elected to full term in 1826.Resigned because of failing health. | 8 | 20th | 7 | Re-elected in 1823.Resigned and immediately re-elected for the class 1 seat. | Mar 4, 1817 – Jan 30, 1829 | Jacksonian | Mahlon Dickerson | 8 |
| Vacant | Vacant | Vacant | Jan 12, 1829 – Jan 30, 1829 | | 8 | 20th | 7 | Re-elected in 1823.Resigned and immediately re-elected for the class 1 seat. | Mar 4, 1817 – Jan 30, 1829 | Jacksonian | Mahlon Dickerson | 8 |
| 12 | Mahlon Dickerson | Jacksonian | Jan 30, 1829 – Mar 3, 1833 | Elected to finish Bateman's term. | 8 | 20th | 7 | | Jan 30, 1829 – Mar 3, 1829 | Vacant | Vacant | Vacant |
| 12 | Mahlon Dickerson | Jacksonian | Jan 30, 1829 – Mar 3, 1833 | Elected to finish Bateman's term. | 8 | 21st | 8 | Elected in 1829. | Mar 4, 1829 – Mar 3, 1835 | National Republican | Theodore Frelinghuysen | 9 |
| 12 | Mahlon Dickerson | Jacksonian | Jan 30, 1829 – Mar 3, 1833 | Elected to finish Bateman's term. | 8 | 22nd | 8 | Elected in 1829. | Mar 4, 1829 – Mar 3, 1835 | National Republican | Theodore Frelinghuysen | 9 |
| 13 | Samuel L. Southard | National Republican | Mar 4, 1833 – Jun 26, 1842 | Elected in 1833. | 9 | 23rd | 8 | Elected in 1829. | Mar 4, 1829 – Mar 3, 1835 | National Republican | Theodore Frelinghuysen | 9 |
| 13 | Samuel L. Southard | National Republican | Mar 4, 1833 – Jun 26, 1842 | Elected in 1833. | 9 | 24th | 9 | Elected in 1835.Lost re-election. | Mar 4, 1835 – Mar 3, 1841 | Jacksonian | Garret D. Wall | 10 |
| 13 | Samuel L. Southard | Whig | Mar 4, 1833 – Jun 26, 1842 | Elected in 1833. | 9 | 25th | 9 | Elected in 1835.Lost re-election. | Mar 4, 1835 – Mar 3, 1841 | Democratic | Garret D. Wall | 10 |
| 13 | Samuel L. Southard | Whig | Mar 4, 1833 – Jun 26, 1842 | Re-elected in 1839.Resigned due to failing health. | 10 | 26th | 9 | Elected in 1835.Lost re-election. | Mar 4, 1835 – Mar 3, 1841 | Democratic | Garret D. Wall | 10 |
| 13 | Samuel L. Southard | Whig | Mar 4, 1833 – Jun 26, 1842 | Re-elected in 1839.Resigned due to failing health. | 10 | 27th | 10 | Elected in 1840. | Mar 4, 1841 – Mar 3, 1853 | Whig | Jacob W. Miller | 11 |
| Vacant | Vacant | Vacant | Jun 26, 1842 – Jul 2, 1842 | | 10 | 27th | 10 | Elected in 1840. | Mar 4, 1841 – Mar 3, 1853 | Whig | Jacob W. Miller | 11 |
| 14 | William L. Dayton | Whig | Jul 2, 1842 – Mar 3, 1851 | Appointed to continue Southard's term.Elected to finish Southard's term. | 10 | 27th | 10 | Elected in 1840. | Mar 4, 1841 – Mar 3, 1853 | Whig | Jacob W. Miller | 11 |
| 14 | William L. Dayton | Whig | Jul 2, 1842 – Mar 3, 1851 | Appointed to continue Southard's term.Elected to finish Southard's term. | 10 | 28th | 10 | Elected in 1840. | Mar 4, 1841 – Mar 3, 1853 | Whig | Jacob W. Miller | 11 |
| 14 | William L. Dayton | Whig | Jul 2, 1842 – Mar 3, 1851 | Re-elected in 1845.Lost re-election. | 11 | 29th | 10 | Elected in 1840. | Mar 4, 1841 – Mar 3, 1853 | Whig | Jacob W. Miller | 11 |
| 14 | William L. Dayton | Whig | Jul 2, 1842 – Mar 3, 1851 | Re-elected in 1845.Lost re-election. | 11 | 30th | 11 | Re-elected in 1846.Lost re-election. | Mar 4, 1841 – Mar 3, 1853 | Whig | Jacob W. Miller | 11 |
| 14 | William L. Dayton | Whig | Jul 2, 1842 – Mar 3, 1851 | Re-elected in 1845.Lost re-election. | 11 | 31st | 11 | Re-elected in 1846.Lost re-election. | Mar 4, 1841 – Mar 3, 1853 | Whig | Jacob W. Miller | 11 |
| 15 | Robert F. Stockton | Democratic | Mar 4, 1851 – Jan 10, 1853 | Elected in 1851.Resigned to become President of the Delaware and Raritan Canal Company. | 12 | 32nd | 11 | Re-elected in 1846.Lost re-election. | Mar 4, 1841 – Mar 3, 1853 | Whig | Jacob W. Miller | 11 |
| Vacant | Vacant | Vacant | Jan 10, 1853 – Mar 4, 1853 | | 12 | 32nd | 11 | Re-elected in 1846.Lost re-election. | Mar 4, 1841 – Mar 3, 1853 | Whig | Jacob W. Miller | 11 |
| 16 | John Renshaw Thomson | Democratic | Mar 4, 1853 – Sep 12, 1862 | Elected to finish Stockton's term. | 12 | 33rd | 12 | Elected in 1853.Lost re-election. | Mar 4, 1853 – Mar 3, 1859 | Democratic | William Wright | 12 |
| 16 | John Renshaw Thomson | Democratic | Mar 4, 1853 – Sep 12, 1862 | Elected to finish Stockton's term. | 12 | 34th | 12 | Elected in 1853.Lost re-election. | Mar 4, 1853 – Mar 3, 1859 | Democratic | William Wright | 12 |
| 16 | John Renshaw Thomson | Democratic | Mar 4, 1853 – Sep 12, 1862 | Re-elected in 1857.Died. | 13 | 35th | 12 | Elected in 1853.Lost re-election. | Mar 4, 1853 – Mar 3, 1859 | Democratic | William Wright | 12 |
| 16 | John Renshaw Thomson | Democratic | Mar 4, 1853 – Sep 12, 1862 | Re-elected in 1857.Died. | 13 | 36th | 13 | Elected in 1858.Lost re-election. | Mar 4, 1859 – Mar 3, 1865 | Republican | John C. Ten Eyck | 13 |
| 16 | John Renshaw Thomson | Democratic | Mar 4, 1853 – Sep 12, 1862 | Re-elected in 1857.Died. | 13 | 37th | 13 | Elected in 1858.Lost re-election. | Mar 4, 1859 – Mar 3, 1865 | Republican | John C. Ten Eyck | 13 |
| Vacant | Vacant | Vacant | Sep 12, 1862 – Nov 21, 1862 | | 13 | 37th | 13 | Elected in 1858.Lost re-election. | Mar 4, 1859 – Mar 3, 1865 | Republican | John C. Ten Eyck | 13 |
| 17 | Richard Stockton Field | Republican | Nov 21, 1862 – Jan 14, 1863 | Appointed to continue Thomson's term.Retired when his successor was elected. | 13 | 37th | 13 | Elected in 1858.Lost re-election. | Mar 4, 1859 – Mar 3, 1865 | Republican | John C. Ten Eyck | 13 |
| 18 | James Walter Wall | Democratic | Jan 14, 1863 – Mar 3, 1863 | Elected to finish Thomson's term.Lost re-election. | 13 | 37th | 13 | Elected in 1858.Lost re-election. | Mar 4, 1859 – Mar 3, 1865 | Republican | John C. Ten Eyck | 13 |
| 19 | William Wright | Democratic | Mar 4, 1863 – Nov 1, 1866 | Elected in 1863.Died. | 14 | 38th | 13 | Elected in 1858.Lost re-election. | Mar 4, 1859 – Mar 3, 1865 | Republican | John C. Ten Eyck | 13 |
| 19 | William Wright | Democratic | Mar 4, 1863 – Nov 1, 1866 | Elected in 1863.Died. | 14 | 39th | 14 | | Mar 3, 1865– Mar 15, 1865 | Vacant | Vacant | Vacant |
| 19 | William Wright | Democratic | Mar 4, 1863 – Nov 1, 1866 | Elected in 1863.Died. | 14 | 39th | 14 | Elected in 1864.Election disputed and seat declared vacant. | Mar 15, 1865 – Mar 27, 1866 | Democratic | John P. Stockton | 14 |
| 19 | William Wright | Democratic | Mar 4, 1863 – Nov 1, 1866 | Elected in 1863.Died. | 14 | 39th | 14 | | Mar 27, 1866 – Sep 19, 1866 | Vacant | Vacant | Vacant |
| 19 | William Wright | Democratic | Mar 4, 1863 – Nov 1, 1866 | Elected in 1863.Died. | 14 | 39th | 14 | Elected to finish Stockton's term.Retired. | Sep 19, 1866 – Mar 3, 1871 | Republican | Alexander G. Cattell | 15 |
| Vacant | Vacant | Vacant | Nov 1, 1866 – Nov 12, 1866 | | 14 | 39th | 14 | Elected to finish Stockton's term.Retired. | Sep 19, 1866 – Mar 3, 1871 | Republican | Alexander G. Cattell | 15 |
| 20 | Frederick T. Frelinghuysen | Republican | Nov 12, 1866 – Mar 3, 1869 | Appointed to continue Wright's term.Elected in 1867 to finish Wright's term.Lost re-election. | 14 | 39th | 14 | Elected to finish Stockton's term.Retired. | Sep 19, 1866 – Mar 3, 1871 | Republican | Alexander G. Cattell | 15 |
| 20 | Frederick T. Frelinghuysen | Republican | Nov 12, 1866 – Mar 3, 1869 | Appointed to continue Wright's term.Elected in 1867 to finish Wright's term.Lost re-election. | 14 | 40th | 14 | Elected to finish Stockton's term.Retired. | Sep 19, 1866 – Mar 3, 1871 | Republican | Alexander G. Cattell | 15 |
| 21 | John P. Stockton | Democratic | Mar 4, 1869 – Mar 3, 1875 | Elected in 1869. | 15 | 41st | 14 | Elected to finish Stockton's term.Retired. | Sep 19, 1866 – Mar 3, 1871 | Republican | Alexander G. Cattell | 15 |
| 21 | John P. Stockton | Democratic | Mar 4, 1869 – Mar 3, 1875 | Elected in 1869. | 15 | 42nd | 15 | Elected in 1870 or 1871.Lost re-election. | Mar 4, 1871– Mar 3, 1877 | Republican | Frederick T. Frelinghuysen | 16 |
| 21 | John P. Stockton | Democratic | Mar 4, 1869 – Mar 3, 1875 | Elected in 1869. | 15 | 43rd | 15 | Elected in 1870 or 1871.Lost re-election. | Mar 4, 1871– Mar 3, 1877 | Republican | Frederick T. Frelinghuysen | 16 |
| 22 | Theodore F. Randolph | Democratic | Mar 4, 1875 – Mar 3, 1881 | Elected in 1875. | 16 | 44th | 15 | Elected in 1870 or 1871.Lost re-election. | Mar 4, 1871– Mar 3, 1877 | Republican | Frederick T. Frelinghuysen | 16 |
| 22 | Theodore F. Randolph | Democratic | Mar 4, 1875 – Mar 3, 1881 | Elected in 1875. | 16 | 45th | 16 | Elected in 1877. | Mar 4, 1877– Mar 3, 1895 | Democratic | John R. McPherson | 17 |
| 22 | Theodore F. Randolph | Democratic | Mar 4, 1875 – Mar 3, 1881 | Elected in 1875. | 16 | 46th | 16 | Elected in 1877. | Mar 4, 1877– Mar 3, 1895 | Democratic | John R. McPherson | 17 |
| 23 | William J. Sewell | Republican | Mar 4, 1881 – Mar 3, 1887 | Elected in 1881.Lost re-election. | 17 | 47th | 16 | Elected in 1877. | Mar 4, 1877– Mar 3, 1895 | Democratic | John R. McPherson | 17 |
| 23 | William J. Sewell | Republican | Mar 4, 1881 – Mar 3, 1887 | Elected in 1881.Lost re-election. | 17 | 48th | 17 | Re-elected in 1883. | Mar 4, 1877– Mar 3, 1895 | Democratic | John R. McPherson | 17 |
| 23 | William J. Sewell | Republican | Mar 4, 1881 – Mar 3, 1887 | Elected in 1881.Lost re-election. | 17 | 49th | 17 | Re-elected in 1883. | Mar 4, 1877– Mar 3, 1895 | Democratic | John R. McPherson | 17 |
| 24 | Rufus Blodgett | Democratic | Mar 4, 1887 – Mar 3, 1893 | Elected in 1886.Retired. | 18 | 50th | 17 | Re-elected in 1883. | Mar 4, 1877– Mar 3, 1895 | Democratic | John R. McPherson | 17 |
| 24 | Rufus Blodgett | Democratic | Mar 4, 1887 – Mar 3, 1893 | Elected in 1886.Retired. | 18 | 51st | 18 | Re-elected in 1889. | Mar 4, 1877– Mar 3, 1895 | Democratic | John R. McPherson | 17 |
| 24 | Rufus Blodgett | Democratic | Mar 4, 1887 – Mar 3, 1893 | Elected in 1886.Retired. | 18 | 52nd | 18 | Re-elected in 1889. | Mar 4, 1877– Mar 3, 1895 | Democratic | John R. McPherson | 17 |
| 25 | James Smith Jr. | Democratic | Mar 4, 1893 – Mar 3, 1899 | Elected in 1893.Lost re-election. | 19 | 53rd | 18 | Re-elected in 1889. | Mar 4, 1877– Mar 3, 1895 | Democratic | John R. McPherson | 17 |
| 25 | James Smith Jr. | Democratic | Mar 4, 1893 – Mar 3, 1899 | Elected in 1893.Lost re-election. | 19 | 54th | 19 | Elected in 1895. | Mar 4, 1895– Dec 27, 1901 | Republican | William J. Sewell | 18 |
| 25 | James Smith Jr. | Democratic | Mar 4, 1893 – Mar 3, 1899 | Elected in 1893.Lost re-election. | 19 | 55th | 19 | Elected in 1895. | Mar 4, 1895– Dec 27, 1901 | Republican | William J. Sewell | 18 |
| 26 | John Kean | Republican | Mar 4, 1899 – Mar 3, 1911 | Elected in 1899. | 20 | 56th | 19 | Elected in 1895. | Mar 4, 1895– Dec 27, 1901 | Republican | William J. Sewell | 18 |
| 26 | John Kean | Republican | Mar 4, 1899 – Mar 3, 1911 | Elected in 1899. | 20 | 57th | 20 | Re-elected in 1901.Died. | Mar 4, 1895– Dec 27, 1901 | Republican | William J. Sewell | 18 |
| 26 | John Kean | Republican | Mar 4, 1899 – Mar 3, 1911 | Elected in 1899. | 20 | 57th | 20 | | Dec 27, 1901– Jan 29, 1902 | Vacant | Vacant | Vacant |
| 26 | John Kean | Republican | Mar 4, 1899 – Mar 3, 1911 | Elected in 1899. | 20 | 57th | 20 | Elected to finish Sewell's term.Withdrew from election contest to full term. | Jan 29, 1902– Mar 3, 1907 | Republican | John F. Dryden | 19 |
| 26 | John Kean | Republican | Mar 4, 1899 – Mar 3, 1911 | Elected in 1899. | 20 | 58th | 20 | Elected to finish Sewell's term.Withdrew from election contest to full term. | Jan 29, 1902– Mar 3, 1907 | Republican | John F. Dryden | 19 |
| 26 | John Kean | Republican | Mar 4, 1899 – Mar 3, 1911 | Re-elected in 1905.Retired. | 21 | 59th | 20 | Elected to finish Sewell's term.Withdrew from election contest to full term. | Jan 29, 1902– Mar 3, 1907 | Republican | John F. Dryden | 19 |
| 26 | John Kean | Republican | Mar 4, 1899 – Mar 3, 1911 | Re-elected in 1905.Retired. | 21 | 60th | 21 | Elected in 1907.Lost re-election. | Mar 4, 1907 – Mar 3, 1913 | Republican | Frank O. Briggs | 20 |
| 26 | John Kean | Republican | Mar 4, 1899 – Mar 3, 1911 | Re-elected in 1905.Retired. | 21 | 61st | 21 | Elected in 1907.Lost re-election. | Mar 4, 1907 – Mar 3, 1913 | Republican | Frank O. Briggs | 20 |
| 27 | James E. Martine | Democratic | Mar 4, 1911 – Mar 3, 1917 | Elected in 1911.Lost re-election. | 22 | 62nd | 21 | Elected in 1907.Lost re-election. | Mar 4, 1907 – Mar 3, 1913 | Republican | Frank O. Briggs | 20 |
| 27 | James E. Martine | Democratic | Mar 4, 1911 – Mar 3, 1917 | Elected in 1911.Lost re-election. | 22 | 63rd | 22 | Elected in 1913.Died. | Mar 4, 1913 – Jan 30, 1918 | Democratic | William Hughes | 21 |
| 27 | James E. Martine | Democratic | Mar 4, 1911 – Mar 3, 1917 | Elected in 1911.Lost re-election. | 22 | 64th | 22 | Elected in 1913.Died. | Mar 4, 1913 – Jan 30, 1918 | Democratic | William Hughes | 21 |
| 28 | Joseph S. Frelinghuysen Sr. | Republican | Mar 4, 1917 – Mar 3, 1923 | Elected in 1916.Lost re-election. | 23 | 65th | 22 | Elected in 1913.Died. | Mar 4, 1913 – Jan 30, 1918 | Democratic | William Hughes | 21 |
| 28 | Joseph S. Frelinghuysen Sr. | Republican | Mar 4, 1917 – Mar 3, 1923 | Elected in 1916.Lost re-election. | 23 | 65th | 22 | | Jan 30, 1918 – Feb 23, 1918 | Vacant | Vacant | Vacant |
| 28 | Joseph S. Frelinghuysen Sr. | Republican | Mar 4, 1917 – Mar 3, 1923 | Elected in 1916.Lost re-election. | 23 | 65th | 22 | Appointed to continue Hughes's term.Elected in 1918 to finish Hughes's term.Retired. | Feb 23, 1918 – Mar 3, 1919 | Republican | David Baird Sr. | 22 |
| 28 | Joseph S. Frelinghuysen Sr. | Republican | Mar 4, 1917 – Mar 3, 1923 | Elected in 1916.Lost re-election. | 23 | 66th | 23 | Elected in 1918. | Mar 4, 1919 – Nov 21, 1929 | Republican | Walter E. Edge | 23 |
| 28 | Joseph S. Frelinghuysen Sr. | Republican | Mar 4, 1917 – Mar 3, 1923 | Elected in 1916.Lost re-election. | 23 | 67th | 23 | Elected in 1918. | Mar 4, 1919 – Nov 21, 1929 | Republican | Walter E. Edge | 23 |
| 29 | Edward I. Edwards | Democratic | Mar 4, 1923 – Mar 3, 1929 | Elected in 1922.Lost re-election. | 24 | 68th | 23 | Elected in 1918. | Mar 4, 1919 – Nov 21, 1929 | Republican | Walter E. Edge | 23 |
| 29 | Edward I. Edwards | Democratic | Mar 4, 1923 – Mar 3, 1929 | Elected in 1922.Lost re-election. | 24 | 69th | 24 | Re-elected in 1924.Resigned to become U.S. Ambassador to France. | Mar 4, 1919 – Nov 21, 1929 | Republican | Walter E. Edge | 23 |
| 29 | Edward I. Edwards | Democratic | Mar 4, 1923 – Mar 3, 1929 | Elected in 1922.Lost re-election. | 24 | 70th | 24 | Re-elected in 1924.Resigned to become U.S. Ambassador to France. | Mar 4, 1919 – Nov 21, 1929 | Republican | Walter E. Edge | 23 |
| 30 | Hamilton F. Kean | Republican | Mar 4, 1929 – Jan 3, 1935 | Elected in 1928.Lost re-election. | 25 | 71st | 24 | Re-elected in 1924.Resigned to become U.S. Ambassador to France. | Mar 4, 1919 – Nov 21, 1929 | Republican | Walter E. Edge | 23 |
| 30 | Hamilton F. Kean | Republican | Mar 4, 1929 – Jan 3, 1935 | Elected in 1928.Lost re-election. | 25 | 71st | 24 | | Nov 21, 1929 – Nov 30, 1929 | Vacant | Vacant | Vacant |
| 30 | Hamilton F. Kean | Republican | Mar 4, 1929 – Jan 3, 1935 | Elected in 1928.Lost re-election. | 25 | 71st | 24 | Appointed to continue Edge's term.Retired when his successor was qualified. | Nov 30, 1929 – Dec 2, 1930 | Republican | David Baird Jr. | 24 |
| 30 | Hamilton F. Kean | Republican | Mar 4, 1929 – Jan 3, 1935 | Elected in 1928.Lost re-election. | 25 | 71st | 24 | Elected in 1930 to finish Edge's term. | Dec 3, 1930 – Oct 5, 1931 | Republican | Dwight Morrow | 25 |
| 30 | Hamilton F. Kean | Republican | Mar 4, 1929 – Jan 3, 1935 | Elected in 1928.Lost re-election. | 25 | 72nd | 25 | Elected to full term in 1930.Died. | Dec 3, 1930 – Oct 5, 1931 | Republican | Dwight Morrow | 25 |
| 30 | Hamilton F. Kean | Republican | Mar 4, 1929 – Jan 3, 1935 | Elected in 1928.Lost re-election. | 25 | 72nd | 25 | | Oct 5, 1931 – Dec 1, 1931 | Vacant | Vacant | Vacant |
| 30 | Hamilton F. Kean | Republican | Mar 4, 1929 – Jan 3, 1935 | Elected in 1928.Lost re-election. | 25 | 72nd | 25 | Appointed to continue Morrow's term.Elected in 1932 to finish Morrow's term.Lost re-election. | Dec 1, 1931 – Jan 3, 1937 | Republican | W. Warren Barbour | 26 |
| 30 | Hamilton F. Kean | Republican | Mar 4, 1929 – Jan 3, 1935 | Elected in 1928.Lost re-election. | 25 | 73rd | 25 | Appointed to continue Morrow's term.Elected in 1932 to finish Morrow's term.Lost re-election. | Dec 1, 1931 – Jan 3, 1937 | Republican | W. Warren Barbour | 26 |
| 31 | A. Harry Moore | Democratic | Jan 3, 1935 – Jan 17, 1938 | Elected in 1934.Resigned to become governor. | 26 | 74th | 25 | Appointed to continue Morrow's term.Elected in 1932 to finish Morrow's term.Lost re-election. | Dec 1, 1931 – Jan 3, 1937 | Republican | W. Warren Barbour | 26 |
| 31 | A. Harry Moore | Democratic | Jan 3, 1935 – Jan 17, 1938 | Elected in 1934.Resigned to become governor. | 26 | 75th | 26 | Elected in 1936.Lost re-election. | Jan 3, 1937 – Jan 3, 1943 | Democratic | William H. Smathers | 27 |
| 32 | John Milton | Democratic | Jan 18, 1938 – Nov 8, 1938 | Appointed to continue Moore's term.Retired when successor qualified. | 26 | 75th | 26 | Elected in 1936.Lost re-election. | Jan 3, 1937 – Jan 3, 1943 | Democratic | William H. Smathers | 27 |
| 33 | W. Warren Barbour | Republican | Nov 8, 1938 – Nov 22, 1943 | Elected to finish Moore's term | 26 | 75th | 26 | Elected in 1936.Lost re-election. | Jan 3, 1937 – Jan 3, 1943 | Democratic | William H. Smathers | 27 |
| 33 | W. Warren Barbour | Republican | Nov 8, 1938 – Nov 22, 1943 | Elected to finish Moore's term | 26 | 76th | 26 | Elected in 1936.Lost re-election. | Jan 3, 1937 – Jan 3, 1943 | Democratic | William H. Smathers | 27 |
| 33 | W. Warren Barbour | Republican | Nov 8, 1938 – Nov 22, 1943 | Re-elected in 1940.Died. | 27 | 77th | 26 | Elected in 1936.Lost re-election. | Jan 3, 1937 – Jan 3, 1943 | Democratic | William H. Smathers | 27 |
| 33 | W. Warren Barbour | Republican | Nov 8, 1938 – Nov 22, 1943 | Re-elected in 1940.Died. | 27 | 78th | 27 | Elected in 1942.Retired. | Jan 3, 1943 – Jan 3, 1949 | Republican | Albert W. Hawkes | 28 |
| Vacant | Vacant | Vacant | Nov 22, 1943 – Nov 26, 1943 | | 27 | 78th | 27 | Elected in 1942.Retired. | Jan 3, 1943 – Jan 3, 1949 | Republican | Albert W. Hawkes | 28 |
| 34 | Arthur Walsh | Democratic | Nov 26, 1943 – Dec 7, 1944 | Appointed to finish Barbour's termRetired when successor was elected | 27 | 78th | 27 | Elected in 1942.Retired. | Jan 3, 1943 – Jan 3, 1949 | Republican | Albert W. Hawkes | 28 |
| 35 | H. Alexander Smith | Republican | Dec 7, 1944– Jan 3, 1959 | Elected to finish Barbour's term. | 27 | 78th | 27 | Elected in 1942.Retired. | Jan 3, 1943 – Jan 3, 1949 | Republican | Albert W. Hawkes | 28 |
| 35 | H. Alexander Smith | Republican | Dec 7, 1944– Jan 3, 1959 | Elected to finish Barbour's term. | 27 | 79th | 27 | Elected in 1942.Retired. | Jan 3, 1943 – Jan 3, 1949 | Republican | Albert W. Hawkes | 28 |
| 35 | H. Alexander Smith | Republican | Dec 7, 1944– Jan 3, 1959 | Re-elected in 1946. | 28 | 80th | 27 | Elected in 1942.Retired. | Jan 3, 1943 – Jan 3, 1949 | Republican | Albert W. Hawkes | 28 |
| 35 | H. Alexander Smith | Republican | Dec 7, 1944– Jan 3, 1959 | Re-elected in 1946. | 28 | 81st | 28 | Elected in 1948.Retired. | Jan 3, 1949 – Jan 3, 1955 | Republican | Robert C. Hendrickson | 29 |
| 35 | H. Alexander Smith | Republican | Dec 7, 1944– Jan 3, 1959 | Re-elected in 1946. | 28 | 82nd | 28 | Elected in 1948.Retired. | Jan 3, 1949 – Jan 3, 1955 | Republican | Robert C. Hendrickson | 29 |
| 35 | H. Alexander Smith | Republican | Dec 7, 1944– Jan 3, 1959 | Re-elected in 1952.Retired. | 29 | 83rd | 28 | Elected in 1948.Retired. | Jan 3, 1949 – Jan 3, 1955 | Republican | Robert C. Hendrickson | 29 |
| 35 | H. Alexander Smith | Republican | Dec 7, 1944– Jan 3, 1959 | Re-elected in 1952.Retired. | 29 | 84th | 29 | Elected in 1954. | Jan 3, 1955 – Jan 3, 1979 | Republican | Clifford P. Case | 30 |
| 35 | H. Alexander Smith | Republican | Dec 7, 1944– Jan 3, 1959 | Re-elected in 1952.Retired. | 29 | 85th | 29 | Elected in 1954. | Jan 3, 1955 – Jan 3, 1979 | Republican | Clifford P. Case | 30 |
| 36 | Harrison A. Williams | Democratic | Jan 3, 1959– Mar 11, 1982 | Elected in 1958. | 30 | 86th | 29 | Elected in 1954. | Jan 3, 1955 – Jan 3, 1979 | Republican | Clifford P. Case | 30 |
| 36 | Harrison A. Williams | Democratic | Jan 3, 1959– Mar 11, 1982 | Elected in 1958. | 30 | 87th | 30 | Re-elected in 1960. | Jan 3, 1955 – Jan 3, 1979 | Republican | Clifford P. Case | 30 |
| 36 | Harrison A. Williams | Democratic | Jan 3, 1959– Mar 11, 1982 | Elected in 1958. | 30 | 88th | 30 | Re-elected in 1960. | Jan 3, 1955 – Jan 3, 1979 | Republican | Clifford P. Case | 30 |
| 36 | Harrison A. Williams | Democratic | Jan 3, 1959– Mar 11, 1982 | Re-elected in 1964. | 31 | 89th | 30 | Re-elected in 1960. | Jan 3, 1955 – Jan 3, 1979 | Republican | Clifford P. Case | 30 |
| 36 | Harrison A. Williams | Democratic | Jan 3, 1959– Mar 11, 1982 | Re-elected in 1964. | 31 | 90th | 31 | Re-elected in 1966. | Jan 3, 1955 – Jan 3, 1979 | Republican | Clifford P. Case | 30 |
| 36 | Harrison A. Williams | Democratic | Jan 3, 1959– Mar 11, 1982 | Re-elected in 1964. | 31 | 91st | 31 | Re-elected in 1966. | Jan 3, 1955 – Jan 3, 1979 | Republican | Clifford P. Case | 30 |
| 36 | Harrison A. Williams | Democratic | Jan 3, 1959– Mar 11, 1982 | Re-elected in 1970. | 32 | 92nd | 31 | Re-elected in 1966. | Jan 3, 1955 – Jan 3, 1979 | Republican | Clifford P. Case | 30 |
| 36 | Harrison A. Williams | Democratic | Jan 3, 1959– Mar 11, 1982 | Re-elected in 1970. | 32 | 93rd | 32 | Re-elected in 1972.Lost renomination. | Jan 3, 1955 – Jan 3, 1979 | Republican | Clifford P. Case | 30 |
| 36 | Harrison A. Williams | Democratic | Jan 3, 1959– Mar 11, 1982 | Re-elected in 1970. | 32 | 94th | 32 | Re-elected in 1972.Lost renomination. | Jan 3, 1955 – Jan 3, 1979 | Republican | Clifford P. Case | 30 |
| 36 | Harrison A. Williams | Democratic | Jan 3, 1959– Mar 11, 1982 | Re-elected in 1976.Resigned. | 33 | 95th | 32 | Re-elected in 1972.Lost renomination. | Jan 3, 1955 – Jan 3, 1979 | Republican | Clifford P. Case | 30 |
| 36 | Harrison A. Williams | Democratic | Jan 3, 1959– Mar 11, 1982 | Re-elected in 1976.Resigned. | 33 | 96th | 33 | Elected in 1978. | Jan 3, 1979 – Jan 3, 1997 | Democratic | Bill Bradley | 31 |
| 36 | Harrison A. Williams | Democratic | Jan 3, 1959– Mar 11, 1982 | Re-elected in 1976.Resigned. | 33 | 97th | 33 | Elected in 1978. | Jan 3, 1979 – Jan 3, 1997 | Democratic | Bill Bradley | 31 |
| Vacant | Vacant | Vacant | Mar 11, 1982 – Apr 12, 1982 | | 33 | 97th | 33 | Elected in 1978. | Jan 3, 1979 – Jan 3, 1997 | Democratic | Bill Bradley | 31 |
| 37 | Nicholas F. Brady | Republican | Apr 12, 1982 – Dec 27, 1982 | Appointed to finish Williams's term.Retired and resigned early to give his elected successor preferential seniority. | 33 | 97th | 33 | Elected in 1978. | Jan 3, 1979 – Jan 3, 1997 | Democratic | Bill Bradley | 31 |
| 38 | Frank Lautenberg | Democratic | Dec 27, 1982 – Jan 3, 2001 | Appointed early to finish Williams's term, having been already elected to the next term. | 33 | 97th | 33 | Elected in 1978. | Jan 3, 1979 – Jan 3, 1997 | Democratic | Bill Bradley | 31 |
| 38 | Frank Lautenberg | Democratic | Dec 27, 1982 – Jan 3, 2001 | Elected in 1982. | 34 | 98th | 33 | Elected in 1978. | Jan 3, 1979 – Jan 3, 1997 | Democratic | Bill Bradley | 31 |
| 38 | Frank Lautenberg | Democratic | Dec 27, 1982 – Jan 3, 2001 | Elected in 1982. | 34 | 99th | 34 | Re-elected in 1984. | Jan 3, 1979 – Jan 3, 1997 | Democratic | Bill Bradley | 31 |
| 38 | Frank Lautenberg | Democratic | Dec 27, 1982 – Jan 3, 2001 | Elected in 1982. | 34 | 100th | 34 | Re-elected in 1984. | Jan 3, 1979 – Jan 3, 1997 | Democratic | Bill Bradley | 31 |
| 38 | Frank Lautenberg | Democratic | Dec 27, 1982 – Jan 3, 2001 | Re-elected in 1988. | 35 | 101st | 34 | Re-elected in 1984. | Jan 3, 1979 – Jan 3, 1997 | Democratic | Bill Bradley | 31 |
| 38 | Frank Lautenberg | Democratic | Dec 27, 1982 – Jan 3, 2001 | Re-elected in 1988. | 35 | 102nd | 35 | Re-elected in 1990.Retired. | Jan 3, 1979 – Jan 3, 1997 | Democratic | Bill Bradley | 31 |
| 38 | Frank Lautenberg | Democratic | Dec 27, 1982 – Jan 3, 2001 | Re-elected in 1988. | 35 | 103rd | 35 | Re-elected in 1990.Retired. | Jan 3, 1979 – Jan 3, 1997 | Democratic | Bill Bradley | 31 |
| 38 | Frank Lautenberg | Democratic | Dec 27, 1982 – Jan 3, 2001 | Re-elected in 1994.Retired. | 36 | 104th | 35 | Re-elected in 1990.Retired. | Jan 3, 1979 – Jan 3, 1997 | Democratic | Bill Bradley | 31 |
| 38 | Frank Lautenberg | Democratic | Dec 27, 1982 – Jan 3, 2001 | Re-elected in 1994.Retired. | 36 | 105th | 36 | Elected in 1996.Ran for re-election, but withdrew. | Jan 3, 1997 – Jan 3, 2003 | Democratic | Robert Torricelli | 32 |
| 38 | Frank Lautenberg | Democratic | Dec 27, 1982 – Jan 3, 2001 | Re-elected in 1994.Retired. | 36 | 106th | 36 | Elected in 1996.Ran for re-election, but withdrew. | Jan 3, 1997 – Jan 3, 2003 | Democratic | Robert Torricelli | 32 |
| 39 | Jon Corzine | Democratic | Jan 3, 2001 – Jan 17, 2006 | Elected in 2000.Resigned to become Governor of New Jersey. | 37 | 107th | 36 | Elected in 1996.Ran for re-election, but withdrew. | Jan 3, 1997 – Jan 3, 2003 | Democratic | Robert Torricelli | 32 |
| 39 | Jon Corzine | Democratic | Jan 3, 2001 – Jan 17, 2006 | Elected in 2000.Resigned to become Governor of New Jersey. | 37 | 108th | 37 | Elected in 2002. | Jan 3, 2003 – Jun 3, 2013 | Democratic | Frank Lautenberg | 33 |
| 39 | Jon Corzine | Democratic | Jan 3, 2001 – Jan 17, 2006 | Elected in 2000.Resigned to become Governor of New Jersey. | 37 | 109th | 37 | Elected in 2002. | Jan 3, 2003 – Jun 3, 2013 | Democratic | Frank Lautenberg | 33 |
| 40 | Bob Menendez | Democratic | Jan 17, 2006 – Aug 20, 2024 | Appointed to finish Corzine's term. | 37 | 109th | 37 | Elected in 2002. | Jan 3, 2003 – Jun 3, 2013 | Democratic | Frank Lautenberg | 33 |
| 40 | Bob Menendez | Democratic | Jan 17, 2006 – Aug 20, 2024 | Elected to full term in 2006. | 38 | 110th | 37 | Elected in 2002. | Jan 3, 2003 – Jun 3, 2013 | Democratic | Frank Lautenberg | 33 |
| 40 | Bob Menendez | Democratic | Jan 17, 2006 – Aug 20, 2024 | Elected to full term in 2006. | 38 | 111th | 38 | Re-elected in 2008.Died. | Jan 3, 2003 – Jun 3, 2013 | Democratic | Frank Lautenberg | 33 |
| 40 | Bob Menendez | Democratic | Jan 17, 2006 – Aug 20, 2024 | Elected to full term in 2006. | 38 | 112th | 38 | Re-elected in 2008.Died. | Jan 3, 2003 – Jun 3, 2013 | Democratic | Frank Lautenberg | 33 |
| 40 | Bob Menendez | Democratic | Jan 17, 2006 – Aug 20, 2024 | Re-elected in 2012. | 39 | 113th | 38 | Re-elected in 2008.Died. | Jan 3, 2003 – Jun 3, 2013 | Democratic | Frank Lautenberg | 33 |
| 40 | Bob Menendez | Democratic | Jan 17, 2006 – Aug 20, 2024 | Re-elected in 2012. | 39 | 113th | 38 | | Jun 3, 2013 – Jun 6, 2013 | Vacant | Vacant | Vacant |
| 40 | Bob Menendez | Democratic | Jan 17, 2006 – Aug 20, 2024 | Re-elected in 2012. | 39 | 113th | 38 | Appointed to continue Lautenberg's term.Retired when his successor was elected. | Jun 6, 2013 – Oct 30, 2013 | Republican | Jeffrey Chiesa | 34 |
| 40 | Bob Menendez | Democratic | Jan 17, 2006 – Aug 20, 2024 | Re-elected in 2012. | 39 | 113th | 38 | Elected in 2013 to finish Lautenberg's term. | Oct 31, 2013 – present | Democratic | Cory Booker | 35 |
| 40 | Bob Menendez | Democratic | Jan 17, 2006 – Aug 20, 2024 | Re-elected in 2012. | 39 | 114th | 39 | Re-elected in 2014. | Oct 31, 2013 – present | Democratic | Cory Booker | 35 |
| 40 | Bob Menendez | Democratic | Jan 17, 2006 – Aug 20, 2024 | Re-elected in 2012. | 39 | 115th | 39 | Re-elected in 2014. | Oct 31, 2013 – present | Democratic | Cory Booker | 35 |
| 40 | Bob Menendez | Democratic | Jan 17, 2006 – Aug 20, 2024 | Re-elected in 2018.Resigned due to bribery convictions. | 40 | 116th | 39 | Re-elected in 2014. | Oct 31, 2013 – present | Democratic | Cory Booker | 35 |
| 40 | Bob Menendez | Democratic | Jan 17, 2006 – Aug 20, 2024 | Re-elected in 2018.Resigned due to bribery convictions. | 40 | 117th | 40 | Re-elected in 2020. | Oct 31, 2013 – present | Democratic | Cory Booker | 35 |
| 40 | Bob Menendez | Democratic | Jan 17, 2006 – Aug 20, 2024 | Re-elected in 2018.Resigned due to bribery convictions. | 40 | 118th | 40 | Re-elected in 2020. | Oct 31, 2013 – present | Democratic | Cory Booker | 35 |
| Vacant | Vacant | Vacant | Aug 20, 2024 – Aug 23, 2024 | | 40 | 118th | 40 | Re-elected in 2020. | Oct 31, 2013 – present | Democratic | Cory Booker | 35 |
| 41 | George Helmy | Democratic | Aug 23, 2024 – Dec 8, 2024 | Appointed to finish Menendez's term.Retired at end of term and resigned early to give his elected successor preferential seniority. | 40 | 118th | 40 | Re-elected in 2020. | Oct 31, 2013 – present | Democratic | Cory Booker | 35 |
| 42 | Andy Kim | Democratic | Dec 8, 2024 – present | Appointed early to finish Menendez's term, having been already elected to the next term. | 40 | 118th | 40 | Re-elected in 2020. | Oct 31, 2013 – present | Democratic | Cory Booker | 35 |
| 42 | Andy Kim | Democratic | Dec 8, 2024 – present | Elected in 2024. | 41 | 119th | 40 | Re-elected in 2020. | Oct 31, 2013 – present | Democratic | Cory Booker | 35 |
| 42 | Andy Kim | Democratic | Dec 8, 2024 – present | Elected in 2024. | 41 | 120th | 41 | To be determined in the 2026 election. | To be determined in the 2026 election. | To be determined in the 2026 election. | To be determined in the 2026 election. | To be determined in the 2026 election. |
| 42 | Andy Kim | Democratic | Dec 8, 2024 – present | Elected in 2024. | 41 | 121st | 41 | To be determined in the 2026 election. | To be determined in the 2026 election. | To be determined in the 2026 election. | To be determined in the 2026 election. | To be determined in the 2026 election. |
| # | Senator | Party | Years in office | Electoral history | T | C | T | Electoral history | Years in office | Party | Senator | # |
| Class 1 | Class 1 | Class 1 | Class 1 | Class 1 | Class 1 | C | Class 2 | Class 2 | Class 2 | Class 2 | Class 2 | Class 2 |