Website development 2021-22: Rutgers Web Consulting Services / Ivanok Tavarez and Bart Grebowiec
Website development 2013-14: Ken Albers / Roy Rosenzweig Center for History and New Media, George Mason University.
Website development 2010-12: Brian T. Jacobs / Azavea
Design concept: Brian T. Jacobs
Header illustrations: Library Company of Philadelphia, Historical Society of Pennsylvania, PhillyHistory.org, Visit Philadelphia.
Backgrounders illustrations: PhillyHistory.org, Library of Congress, Visit Philadelphia, and other sources credited on topic pages.
The Encyclopedia of Greater Philadelphia website is hosted at Rutgers-Camden.
System administrator: Jim Schmincke