East Carnegie Why Does Pittsburgh Have 90 Neighborhoods? By Katie Blackley • Feb 28, 2018 Jake Savitz / 90.5 WESA Listen Listening... / 4:18 How did the city decide that there would be 90 neighborhoods? Will there ever be more? 90.5 WESA's Good Question investigates. Pasted to the wall of Department of City Planning is a large, colorful map of Pittsburgh.