Pelagio Antonio de Labastida y Dávalos (March 21, 1816, Zamora, Michoacán — February 4, 1891, Oacalco, Morelos) was a Mexican Roman Catholic prelate, lawyer and doctor of canon law, and politician.

He opposed the doctrines of liberals Melchor Ocampo and Miguel Lerdo de Tejada from the pulpit, calling them heretical.

After the triumph of the Conservatives and on the nomination of Antonio López de Santa Anna, in July 1855 he was consecrated bishop of Puebla, in the cathedral of Mexico City.

On June 21, 1863, together with Juan Nepomuceno Almonte and José Mariano Salas, Labastida was named by the Council of Notables to the Regency of the Empire (before the arrival of Maximilian).

Labastida was removed on November 17, 1863, due to differences with François Achille Bazaine, commander of the French troops.

With the end of the Empire and the triumph of the Republic in 1867, Labastida returned to Europe more or less permanently, but without resigning his position as head of the Catholic Church in Mexico.