Fernando Margáin Berlanga (born 1952) is a Mexican politician from the State of Nuevo León affiliated with the National Action Party (PAN) who has served in the upper house of the Mexican Congress.

Margáin served as municipal president (mayor) of San Pedro from 1994 to 1997.

He was municipal president (mayor) of San Pedro Garza García again from 2006 to 2009.

[1] Son of Ricardo Margain Zozaya who was one of the main politicians in Nuevo León State in the 1960s and 1970s.

In March 2015, he announced his intention of running for municipal president (mayor) of San Pedro Garza García again, this time as a candidate for the Humanist Party.