| Eugenio Lerdo de Tejada | |
| Order: | Alcalde of |
| Office: | Buenos Aires |
| Term Start: | 1765 |
| Term End: | 1766 |
| Predecessor: | Juan Miguel de Esparza |
| Successor: | Juan de Lezica y Torrezuri |
| Birth Date: | 18th century |
| Birth Place: | La Rioja |
| Death Date: | 18th century |
| Death Place: | Buenos Aires, Argentina |
| Nationality: | Spanish |
| Occupation: | Politician |
| Profession: | Jurist |
| Signature: | Eugenio Lerdo de Tejada, firma.jpg |
Eugenio Lerdo de Tejada (c.1720 – c.1800) was a Spanish merchant and politician, who held various public positions in Buenos Aires during the colonial period, including like mayor and regidor of the city.
He was born in Nájera, La Rioja, Spain, and was married in Buenos Aires to María Josefa Bustillo de Zeballos, daughter of Ignacio de Bustillos y Zeballos and Ana Domíguez Rabanal, belonging to a distinguished family.
Eugenio Lerdo de Tejada was appointed as procurator of Buenos Aires in 1762, and served for two terms as mayor of first vote of Buenos Aires, elected in 1761 and 1764. He also served as Corregidor of Oruro during the viceroyalty of José Manso de Velasco.