With nearly 5 million workers, the region boasts the third largest labour market in the US and draws workers from beyond the metropolitan area’s outlying counties. Over 21 000 workers living in the Milwaukee metropolitan region (part of the 21-county Tri-State region) commute to work in metropolitan Chicago, around 17% of these workers travel into the City of Chicago. An equal number commute from the Indianapolis metro-region (which lies beyond the 21-county region) into the Chicago metro-region. The region offers a large, diversified pool of highly qualified workers, with a diverse and rich set of skills and attributes.