Eritrea is 48 times larger than Cook County, Illinois.
Area: 117,600 km2 World Factbook
Population: 6,380,803 (July 2014) World Factbook
Eritrea, officially the State of Eritrea, is a country in the Horn of Africa. Eritrea is the Italian form of the Greek name Ἐρυθραία, meaning "red [land]". With its capital at Asmara, it is bordered by Sudan to the west, Ethiopia in the south, and Djibouti in the east. Wikipedia
Area: 2,468 km2 calculated
Cook County is a county in the United States state of Illinois. As of the 2010 census, the population was 5,194,675. Wikipedia