Jamaica is 4.5 times larger than Cook County, Illinois.
Area: 10,991 km2 World Factbook
Population: 2,930,050 (July 2014) World Factbook
Jamaica is an island country situated in the Caribbean Sea, comprising the third-largest island of the Greater Antilles. Wikipedia
Area: 2,468 km2 calculated
Population: 5,231,351 (2012)
Cook County is a county in the United States state of Illinois. As of the 2010 census, the population was 5,194,675. Wikipedia