Cincinnati, Ohio

Cincinnati and surrounding counties of Brown, Butler, Clermont, Clinton, Highlands, Montgomery, Preble and Warren counties are connected to the high-voltage grid through Duke Energy Ohio, Inc., which was integrated into PJM’s grid operations in January 2012.

Population: 296,943
Electricity customers (residential, commercial and industrial): 255,641*
Total amount of megawatt-hours used: 13,955,383*
*2012 Energy Information Administration data

Fun facts:
The first professional baseball team was the Cincinnati Red Stockings, now the Reds.
The Sons of Daniel Boone, which later became the Boy Scouts of America was founded in Cincinnati.
It was the first city to have a licensed public TV station.