Tres Lomas Partido is a western partido of Buenos Aires Province in Argentina.

The provincial subdivision has a population of about 7,500 inhabitants in an area of 1,253 km2 (484 sq mi), and its capital city is Tres Lomas, which is around 520 km (320 mi) from Buenos Aires.

The economy of Tres Lomas is dominated by agriculture, the main crops are Sunflower, wheat and maize.

There are around 150,000 head of cattle in the district and there are a number of dairy farms producing around 70,000 litres of milk per day.

This article about a place in Buenos Aires Province, Argentina is a stub.