Marta Lainfiesta Dorión (January 10, 1886 – May 8, 1976) was the First Lady of Guatemala from 1931 to 1944, as the wife of Guatemalan President and dictator Jorge Ubico Castañeda.

[1] She was born in Guatemala City, daughter of Victor Lainfiesta Torres and María Josefa Amalia Dorion Klée.

[2] During her husband's political career, she maintained a low profile even after Ubico assumed the presidency in 1931.

Lainfiesta accompanied Ubico only on national and international trips, as well as brief appearances at official events and visits by foreign leaders.

Subsequently, the remains of Ubico were repatriated, and she moved back to Guatemala, where she died in 1976.