Revenues for the city's 11 casinos fell by 13.4 percent in November compared to a year ago.
The previous two months had seen only single-digit decreases, and casino operators in the nation's second-largest gambling market had hoped that another decline of less than 10 percent would signal that the market had hit bottom. But no such luck.
Overall, the casinos won $299.3 million. Slots revenue accounted for $206.8 million of that total, table games the rest.
The Atlantic City casinos have been battered by the recession and competition from slots parlors in neighboring Pennsylvania, New York and Delaware.