Flag of Birmingham, Alabama

The flag of Birmingham, Alabama, was designed by Mrs. Idyl King Sorsby for the occasion of Birmingham's semicentennial in 1921. It was officially adopted as the city's flag, after some minor additions, on August 18, 1925.

In 2004, the North American Vexillological Association conducted a survey of 450 members and visitors to its website to identify the best- and worst-designed city flags in the United States. Birmingham's flag ranked #39 out of 150 with a mean rating of 4.97 on a scale of 0–10.