They are in order of population: Chicago, Aurora, and Rockford.
1. Chicago 2. Detroit 3. Indianapolis
According to the 2000 U.S. Census, the five largest cities in the US are: 1. New York City 2. Los Angeles 3. Chicago 4. Houston 5. Philadelphia
Chicago is the largest city in Illinois.
Aurora,NaperVille, Rockford, Chicago and Joliet.
# Chicago. # Aurora. # Rockford. # Joliet. # Naperville.
Out of the 10 largest cities in the US, California and Texas are both tied for the most number of spots, 3. However, California's 3 largest cities have a much larger total population than Texas' 3 largest cities, yet, Texas' 3 largest cities are all over 1,000,000 in population.
It is the third largest US City by population.
The three largest cities in Illinois are..ChicagoAuroraRockford
1. Springfield - State capital of Illinois 2. Chicago - Capital of Illinois finance / leading shipping center Other important / large cities in Illinois include Peoria, Decateur Rockford and Aurora.
Clearly Chicago, the terminus for Route 66 and one of the largest cities in the U.S.
New York City, Los Angeles and Chicago.