5.8 million is actually the population of the entire province of Barcelona, the metro area is 3.3 million, and the city 1.6 million: https://www.amb.cat/en/web

5.8 million is actually the population of the entire province of Barcelona, the metro area is 3.3 million, and the city 1.6 million: https://www.amb.cat/en/web/area-metropolitana/coneixer-l-area-metropolitana/poblacio https://www.amb.cat/en/web/area-metropolitana/coneixer-l-are... https://www.ine.es/jaxiT3/Datos.htm?t=2861 https://www.ine.es/jaxiT3/Datos.htm?t=2861