Olavarría is a city in the province of Buenos Aires, Argentina.

It is the administrative seat of the Olavarría Partido and has over 111,320 inhabitants, per the 2010 census [INDEC].

The settlement was officially founded on 25 November 1867, and named in honour of Colonel José Valentín de Olavarría (1801–1845), an early Argentine military leader.

Municipal information: Municipal Affairs Federal Institute (IFAM), Municipal Affairs Secretariat, Ministry of Interior, Argentina.

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