Leonardo Castellanos y Castellanos (5 November 1862 in Ecuandureo, Michoacán − 19 May 1912) was a Mexican Roman Catholic bishop.
Ordained to the priesthood on 20 March 1886, Castellanos y Castellanos was named bishop of the Roman Catholic Diocese of Tabasco, Mexico in 1908 and died in 1912 while still in office.[1]