Diamante is a city in the west of the province of Entre Ríos, Argentina, on the eastern shore of the Paraná River.

It has about 20,000 inhabitants as per the 2010 census [INDEC].

It is the head town of the Diamante Department.

The town of Diamante was founded on 27 February 1836, and became a first-class municipality on 13 May 1872.

This article about a place in Entre Ríos Province, Argentina is a stub.