In Philadelphia, 186,000 people live in deep poverty, 12.3 percent of the population, federal data show. That number, along with the city's overall 26 percent poverty rate, are the highest recorded among the nation's 10 most populous cities, according to the data. A family of four is in poverty if it has a cash income of around $24,000; deep poverty for that same family is $12,000 or less.