Eustaquio Méndez is a province in the north-western parts of the Bolivian department of Tarija.
The province borders Chuquisaca Department in the north and west, José María Avilés Province in the south, Cercado Province in the south-east, and Burnet O'Connor Province in the east.
The principal language of the province is Spanish, spoken by 99.7% and 0.4% Guaraní.
78.1% of the population have no access to electricity, 77.8% have no sanitary facilities (1992).
67.8% of the population are employed in agriculture, 0.1% in mining, 5.9% in industry, 26.2% in general services (2001).