Polygamy in the U.S. is not limited to remote enclaves in the West or breakaway sects once affiliated with the Mormon Church. Several scholars say it's growing among black Muslims in the inner city - and particularly in Philadelphia, which is known for its large orthodox black Muslim community.

No one knows exactly how many people live in polygamous families in the U.S. Estimates from academics researching the issue range from 50,000 to 100,000 people.

Take Zaki and Mecca, who have been married for nearly 12 years. In their late 20s, they live in the Philadelphia suburbs, have a 5-year-old son and own a real estate business.

Zaki also has something else: a second wife.

Two years ago, Mecca told her husband she wanted to study Arabic in the Middle East, which would mean a lot of time away from home. (NPR is not using any full names in this story because some of those we interviewed could be prosecuted for bigamy.)

"We were talking about it," Mecca recalls, "and the first thing that came to my mind was, 'I'm going to have to find you another wife!'"

Zaki was game. After all, he had been raised in a polygamous home in Philadelphia. Like many black Muslims, his father subscribed to an orthodox view of Islam that allows a man to marry several women. Zaki says he loved having seven siblings and four mothers, especially at dinnertime.

"I would find out who's making what that particular night. I know that this mom makes barbequed chicken better than my other mom makes fried chicken, so I'm going with the barbequed chicken tonight. Things of that nature," he says with a laugh.

Unlike Zaki, Mecca was raised by a single mother and converted from Southern Baptist to Muslim when she was 16.

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