The Westchester County Clerk is the oldest elected office in Westchester County. Below are the county clerk names and terms of service from 1684 to present.
| Term of Service | County Clerk |
|---|---|
| 1684 | John Ryder, Cortlandt |
| 1684-1688 | Joseph Lee, Yorktown |
| 1688-1691 | Edward Collier, Sing Sing |
| 1691-1698 | Joseph Lee, Yorktown |
| 1698-1707 | Benjamin Collier, Sing Sing |
| 1707-1711 | John Clapp, White Plains |
| 1711-1722 | Daniel Clark, Peekskill |
| 1722-1746 | William Forster, Westchester |
| 1746-1760 | Benjamin Nicoll, Scarsdale |
| 1760-1777 | John Bartow, Pelham |
| 1777-1802 | Richard Hatfield, White Plains |
| 1802-1808 | Thomas Ferris, Westchester |
| 1808-1810 | Elijah Crawford, White Plains |
| 1810-1811 | Thomas Ferris, Westchester |
| 1811-1813 | Elijah Crawford, White Plains |
| 1813-1815 | Thomas Ferris, Westchester |
| 1815-1820 | Elijah Crawford, White Plains |
| 1820-1821 | William Requa, Yonkers |
| 1821-1828 | Nehemiah S. Bates, Bedford |
| 1828-1834 | Nathaniel Bayles, Tarrytown |
| 1834-1839 | John H. Smith, Bedford |
| 1839-1840 | Chauncey Smith, Bedford |
| 1840-1843 | Charles Purdy, White Plains |
| 1843-1849 | Munson I. Lockwood, Pound Ridge |
| 1849-1856 | Robert R. Oakley, White Plains |
| 1856-1859 | John P. Jenkins, White Plains |
| 1859-1867 | Hiram P. Rowel, White Plains |
| 1867 | William W. Pierson, Sing Sing |
| 1868-1877 | J. Malcolm Smith, Sing Sing |
| 1877-1883 | John M. Rowel, White Plains |
| 1883-1886 | James F.D. Crane, Yonkers |
| 1886-1896 | John M. Digney, Yonkers |
| 1896-1902 | Leverett F. Crumb, Peekskill |
| 1902-1908 | Leslie Sutherland, Yonkers |
| 1908-1914 | Frank Buck, Mount Vernon |
| 1914-1920 | Daniel Cashin, Yonkers |
| 1920-1925 | Louis Ellrodt, Mount Vernon |
| 1925-1932 | Charles J.F. Decker, Croton Falls |
| 1932-1938 | Bernard Koch, Yonkers |
| 1938-1943 | Harold Mercer, White Plains |
| 1943-1952 | Robert J. Field, Peekskill |
| 1952-1968 | Edward L. Warren, Mount Vernon |
| 1968-1973 | Edward N. Vetrano, Tarrytown |
| 1974-1983 | George R. Morrow, Jr., Mount Pleasant |
| 1983-1993 | Andrew J. Spano, Yorktown |
| 1994-2005 | Leonard N. Spano, Yonkers |
| 2006-present | Timothy C. Idoni, New Rochelle |