Marcelino Ugarte (1855–1929) was an Argentine jurist and politician, who served for two terms as governor of the Province of Buenos Aires.

[1] He also served as deputy and national senator for the Province of Buenos Aires.

[2] He was born in Buenos Aires, the son of Marcelino Ugarte and Adela Jerónima Lavalle, belonging to an aristocatric family of the City.

[4] His father was Minister of Foreign Affairs of the Argentine Nation during the presidency of Bartolomé Mitre.

[5] By maternal line, he was a nephew grandson of Juan Lavalle, governor of Buenos Aires between 1828 and 1829, and descendant of Guillermo Ross, a Scottish soldier, who served as acting governor of Buenos Aires in the mid-18th century.