Lomas de Zamora, city in eastern Argentina, in Buenos Aires Province, adjoining the city of Buenos Aires.

Lomas de Zamora is located in a region that supports livestock, grain, fruit, and poultry farms. Industries include meat packing, grain, and fruit processing, sawmilling, and the manufacture of dairy products, chemicals, rubber and paper products, and plastic and leather goods. The city is the site of an agricultural school and an art museum. Buenos Aires residents use it for camping and picnics. It has a large British community with separate schools. Population (1991) 574,330.