The name Chicago is a girl's name . Chicago and is often added to lists like Celebrity Baby Names.
From the experts:
Kanye West and Kim Kardashian have done it again for their third child: Chosen a name that feels iconic yet strangely inevitable. They named North and Saint's younger sister Chicago, after Kanye's hometown. The name Chicago derives from a Native American word for "wild garlic," which once grew plentifully in the Illinois city, the third most populous in the US. Though one of the distinctly American names, Chicago has almost never been used as a first name before. The Social Security administration reported no newborns named Chicago in 2016, meaning it was given to fewer than five children, and quite possibly none. But we doubt that will be the case for long. Saint tripled in popularity after they used it for their son!