Carbó is the municipal seat of Carbó Municipality of the state of Sonora, Mexico. The founding dates from 1888, when the main railroad in Sonora began to be constructed. Carbó was one of the stations built between the port of Guaymas and the border town of Nogales. The settlement of Carbó started its life as an important supply station, supplying the merchant…Carbó is the municipal seat of Carbó Municipality of the state of Sonora, Mexico. The founding dates from 1888, when the main railroad in Sonora began to be constructed. Carbó was one of the stations built between the port of Guaymas and the border town of Nogales. The settlement of Carbó started its life as an important supply station, supplying the merchants who came to the mines in the neighboring region of Rayón, Opodepe, and Valle de San Miguel.