In a review by the North American Vexillological Association of 150 American city flags , the Chicago city flag was ranked second best with a rating of 9.03 out of 10 , behind only the flag of Washington , D.C. Symbolism .
In a review by the North American Vexillological Association of 150 American city flags , the Chicago city flag was ranked second best with a rating of 9.03 out of 10 , behind only the flag of Washington , D.C. .