Father Fermín Francisco de Lasuén de Arasqueta (June 7 1736 - June 26 1803) was a Spanish missionary to the Americas.
He was born in Vitoria and joined the Franciscan order, becoming ordained in 1752. In 1758 he volunteered to work in America. He arrived in Mexico in 1761 and was sent to Baja California in 1768. Following the establishment of Mission San Diego de Alcalá in 1769, he went to Northern California in 1773. He was never happy in California. He based himself in San Diego and remained there until 1775; he helped establish Mission San Juan Capistrano before the murder of Father Luís Jayme. Kumeyaay Indian unrest caused his return to San Diego and the general withdrawal of Spanish operations. In late 1776 he went to San Luis Obispo before again returning to San Diego in 1777 when he was made minister there. He was appointed the second Presidente of the missions in California in 1785, replacing Junípero Serra, and transferred to the Mission San Carlos Borromeo de Carmelo. On his death he was succeeded by Father Pedro Estévan Tápis.
He personally established nine of the twenty-one "Alta California" missions:
He also oversaw the expansion of many of the sites.
