The Demographic Statistical Atlas of the United States

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Map of Household Income by Tract in ZIP Code 19717

Median household income ($):

$17k		$26k		$34k		$42k		$50k		$59k

20th percentile of household income ($):

$2,400		$6,400		$10,400		$14,300		$18,300		$22,200

Mean household income of the top 5% of households ($):

$159k		$198k		$237k		$275k		$314k		$353k

Gini Index of income inequality (larger Gini Index means more inequality) (%):

47.0%		50.0%		52.9%		55.8%		58.8%		61.8%

Household Income: total income from all people in the household
Median: in terms of income, it is the income for which 50% of households have a lower income, and 50% have a higher income
Percentile: for example, the 80th percentile of household income is the income for which 80% of household have a lower income and 20% have a higher income
Quintile: a quintile is 20% of a population, grouped by percentile; for example, the 2nd quintile is all members of a population between the 20th and 40th percentiles
Gini Index: a statistical measure of how unevenly income is distributed in a population (ranging from 0% to 100%, the higher the number, the greater the inequality)

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