Chicago Mayor-elect Lori Lightfoot speaks to supporters on election night Tuesday.

Black women govern only 4% of the biggest US cities. But their numbers are growing

Updated 7:53 AM ET, Wed April 3, 2019

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(CNN)When Lori Lightfoot was elected Tuesday as Chicago's first black woman mayor, she joined a small but swelling sisterhood.

Of the 307 US cities with a population of at least 100,000, 13 now have African-American female mayors.