Santiago Emigdio Argüello (1813–1857), a Californio ranchero, civil servant, and military officer.

The son of Santiago Argüello, he was born August 18, 1813, in Alta California.

Argüello was collector of revenue at the Mexican port of San Diego, in Alta California Territory.

He was granted the Rancho Melijo or Rancho de la Punta in 1833, located on the coast and extending from the Tijuana River Valley to San Diego Bay.

He aided the Americans in the Mexican–American War serving as a captain of a company of Californio cavalry,[2] suffering a leg wound in a skirmish with Mexican forces outside San Diego.