Damien Marchesseault (or Marchesseau) (April 1, 1818 – January 20, 1868) was the seventh Mayor of Los Angeles from May 9, 1859 to May 9, 1860 and then again from January 7, 1861 to May 6, 1865. Marchesseault assumed the office one last time interrupting Cristobal Aguilar's first term in office for three months.