Gran Concepción is the third largest conurbation in Chile, after Greater Santiago and Greater Valparaíso, with 945,650 inhabitants according to the 2012 pre census.

It takes its name after the city of Concepción, the regional capital and main city.

The agglomeration is composed of:

Gran Concepción has also the second largest concentration of universities in Chile. Apart from the so-called Traditional Universities, it has several private institutions. The Universidad de Concepción is the most important university in the conurbation.

There is also a commuter rail system which serves most of the communes (Spanish: comunas) in the conurbation: Biotren.

The commerce in Greater Concepcion is mostly located in Concepcion city center, also in the Mall Plaza el Trebol, in Talcahuano.