La Unión de Isidoro Montes de Oca
As of 2005, the municipality had a total population of 25,230. The main towns are La Unión, population 3,079; Petacalco, population 2,671; Zacatula, population 1,417; Lagunillas, population 1,371; El Naranjito, population 1,167; and Surcua, population 1,046. History. On October 26, 1614, the Dutch Captain Joris van Spilbergen - involved in his country's war with Spain - raided with an expedition of five ships this part of the coast of the then Spanish Mexico. At Zacatula he captured the pearl fishing ship "San Francisco".