Colombia is 1,873 times larger than Chicago.
Area: 1,138,910 km2 World Factbook
Population: 46,245,297 (July 2014) World Factbook
Wikipedia
Area: 608 km2 calculated
Population: 2,714,856 (2012)
Chicago is the third most populous city in the United States, after New York City and Los Angeles. With 2.7 million residents, it is the most populous city in both the U.S. state of Illinois and the American Midwest. Wikipedia