2,880 rooms to be exact!! 72 rooms per floor, 4 floors per bldg. = 288 rooms X 10 bldgs. (Max occupancy is 11,220 - this does not account for infants qualified to sleep in pack & plays) When POP Century opened it was the 10th largest hotel in the US and the 27th largest in the world. Just in case you wanted to know....LOL!