Nearly 91.1 million Americans, 78% of households, had one or more credit card at the end of 2008. The average household holds seven credit cards, including bank cards and retailer-specific credit lines. Half of college undergraduates had four or more cards in 2008 and had an average balance spread between them of more than $3,100.

Sources:,, Federal Reserve Survey of Consumer Finances.

-- Reported by Joe Mont in Boston.

If you liked this article you might like

The (James) Bond Market

Junk Mail Folders Can't Contain Spam Profits

Will Summer Concerts Sing the Blues?

'As Seen On TV' Rings the Till For Retailers

Praise and Profit: How Religion Pays Off