Mount Vernon Post Office. Donated by Marie West Berry. “Post Office when Dad was P.M.”
Isaac N. West was Postmaster 07/27/1914 — 03/21/1920
Postmasters
| Name | Date Appointed |
| Elijah D. Waln | 12/06/1849 |
| Joshua Hess | 08/08/1853 |
| Abraham V. Putnam | 08/29/1856 |
| Harry A. Collin | 10/26/1857 |
| Charles R. Collin | 04/27/1860 |
| W. McKean | 04/16/1861 |
| Charles R. Collin | 10/16/1866 |
| G. Barker | 04/05/1867 |
| Luther L. Pease | 07/23/1867 (Spcl. Agent) Acting Postmaster |
| William G. Power | 02/10/1868 |
| Noah McKean | 04/05/1869 |
| Simon H. Bauman | 03/12/1873 |
| Terah S. Brokaw | 11/02/1885 |
| William G. Power | 12/21/1889 |
| Arnold Smouse | 01/12/1894 |
| Wallace M. Moore | 03/01/1898 |
| William G. Power | 03/21/1906 |
| Louis H. Kepler | 06/23/1910 |
| Isaac N. West | 07/27/1914 |
| Frederick W. Wodrich, Jr. | 03/22/1920 |
| Augustus A. Bauman | 10/01/1929 |
| Mrs. Mary C. Bauman | 02/07/1931 Acting Postmaster |
| David H. Mueller | 02/24/1932 |
| Mrs. Byrd S. Clark | 04/03/1936 |
| Fred Baldwin | 07/01/1946 Acting Postmaster |
| Hobert A. Bair | 06/10/1949 |
| Dale G. Travis | 04/30/1968 |
| Charles E. Gosnell | 07/17/1978 Officer-In-Charge |
| Robert J. Mootz | 08/24/1978 |
| John H. Moser | 04/21/1979 |
| Larry T. Juergens | 05/14/1985 Officer-In-Charge |
| Dian Thomas | 07/27/1985 Officer-In-Charge |
| James J. Zimmerman | 09/20/1985 Officer-In-Charge |
| Terry C. Jackson | 10/26/1985 |
| Linda L. McEowen | 01/06/1997 Officer-In-Charge |
| Richard J. Leyendecker | 02/28/1997 Officer-In-Charge |
| Arvin N. Parrott | 04/26/1997 |
| Diane L. McAfee | 12/22/2009 Officer-In-Charge |
| Shawn T. Sternhagen | 02/02/2010 Officer-In-Charge |
| Angela S. Casey | 04/27/2010 Officer-In-Charge |
| Kimberly A. (Raim) Konkowski | 05/08/2010 |