Representatives
| Representative | Party | Years | District home | Note |
|---|---|---|---|---|
| District organized from New Jersey's At-large congressional district | ||||
| James H. Imlay | Federalist | March 4, 1799 – March 3, 1801 | Allentown | Burlington and Monmouth Counties |
| District organized to New Jersey's At-large congressional district | ||||
| District organized from New Jersey's At-large congressional district | ||||
| Littleton Kirkpatrick | Democratic | March 4, 1843 – March 3, 1845 | New Brunswick | Middlesex, Morris, and Somerset Counties |
| Joseph E. Edsall | Democratic | March 4, 1845 – March 3, 1847 | Hamburg | Morris, Sussex, and Warren Counties 1844-1846, Edsall to the 3rd District |
| John Van Dyke | Whig | March 4, 1847 – March 3, 1851 | New Brunswick | Return to 1843 alignment |
| George H. Brown | Whig | March 4, 1851 – March 3, 1853 | Somerville | |
| George Vail | Democratic | March 4, 1853 – March 3, 1857 | Morristown | Bergen, Morris, Passaic, and Sussex Counties |
| John Huyler | Democratic | March 4, 1857 – March 3, 1859 | Hackensack | |
| Jetur R. Riggs | Anti-Lecompton Democrat | March 4, 1859 – March 3, 1861 | Paterson | |
| George T. Cobb | Democratic | March 4, 1861 – March 3, 1863 | Morristown | |
| Andrew J. Rogers | Democratic | March 4, 1863 – March 3, 1867 | Newton | Essex County except City of Newark added |
| John Hill | Republican | March 4, 1867 – March 3, 1873 | Boonton | |
| Robert Hamilton | Democratic | March 4, 1873 - March 3, 1877 | Newton | Hunterdon, Somerset, Sussex, and Warren Counties |
| Alvah A. Clark | Democratic | March 4, 1877 – March 3, 1881 | ||
| Henry S. Harris | Democratic | March 4, 1881 – March 3, 1883 | ||
| Benjamin F. Howey | Republican | March 4, 1883 – March 3, 1885 | ||
| James N. Pidcock | Democratic | March 4, 1885 – March 3, 1889 | ||
| Samuel Fowler | Democratic | March 4, 1889 – March 3, 1893 | ||
| Johnston Cornish | Democratic | March 4, 1893 – March 3, 1895 | Hunterdon, Morris, Sussex, and Warren Counties | |
| Mahlon Pitney | Republican | March 4, 1895 – January 10, 1899 | resigned on election to New Jersey State Senate | |
| Vacant | January 10, 1899 – March 3, 1899 | |||
| Joshua S. Salmon | Democratic | March 4, 1899 – May 6, 1902 | died | |
| Vacant | May 6, 1902 – June 18, 1902 | |||
| De Witt C. Flanagan | Democratic | June 18, 1902 – March 3, 1903 | ||
| William M. Lanning | Republican | March 4, 1903 – June 6, 1904 | resigned on appointment as district judge of 3rd circuit / Hunterdon, Mercer, and Somerset Counties | |
| Vacant | June 6, 1904 – November 8, 1904 | |||
| Ira W. Wood | Republican | November 8, 1904 – March 3, 1913 | ||
| Allan B. Walsh | Democratic | March 4, 1913 – March 3, 1915 | ||
| Elijah C. Hutchinson | Republican | March 4, 1915 – March 3, 1923 | ||
| Charles Browne | Democratic | March 4, 1923 – March 3, 1925 | ||
| Charles A. Eaton | Republican | March 4, 1925 – March 3, 1933 | redistricted to 5th district | |
| D. Lane Powers | Republican | March 4, 1933 – August 30, 1945 | resigned to become member of New Jersey Public Utilities Commission / Burlington and Mercer Counties | |
| Vacant | August 30, 1945 – November 6, 1945 | |||
| Frank A. Mathews, Jr. | Republican | November 6, 1945 – January 3, 1949 | ||
| Charles R. Howell | Democratic | January 3, 1949 – January 3, 1955 | ||
| Frank Thompson, Jr. | Democratic | January 3, 1955 – December 29, 1980 | resigned / Hunterdon, Mercer, Sussex, and Warren Counties 1966-1970 | |
| Vacant | December 29, 1980 – January 3, 1981 | |||
| Chris Smith | Republican | January 3, 1981 – Present | Hamilton Township | Incumbent |
Read more about this topic: New Jersey's 4th Congressional District