Darby is a city located in Pennsylvania. With a 2020 population of 10,638, it is the 61st largest city in Pennsylvania and the 2963rd largest city in the United States. Darby is currently declining at a rate of -0.19% annually and its population has decreased by -0.46% since the most recent census, which recorded a population of 10,687 in 2010. Darby reached it's highest population of 14,059 in 1960. Spanning over 1 miles, Darby has a population density of 12,631 people per square mile.
The average household income in Darby is $53,963 with a poverty rate of 28.20%. The median rental costs in recent years comes to $1,078 per month, and the median house value is $74,600. The median age in Darby is 29.4 years, 27.7 years for males, and 32.8 years for females. For every 100 females there are 81.9 males.