Chicago is a proper noun for a major U.S. city, commonly pronounced with two syllables and a stress on the second: Chi-CA-go. In American English it sounds like /ʃɪˈkɑː.ɡoʊ/; in many British varieties it shifts slightly to /ʃɪˈkɑː.ɡəʊ/. The name is widely used in media, travel, and discussion of urban affairs, and it often appears in compound terms like Chicago-style pizza or Chicago Cubs.
Full pronunciation guide