East Baton Rouge Parish, Louisiana is 8 times larger than Pittsburgh.
Area: 1,215 km2 calculated
East Baton Rouge Parish is a parish located in the U.S. state of Louisiana. As of the 2010 census, the population was 440,171, making it the most populous parish in the state. The parish seat is Baton Rouge, Louisiana's state capital. Wikipedia
Area: 153 km2 calculated
Pittsburgh is the seat of Allegheny County and with a population of 305,841 is the second-largest city in the U.S. state of Pennsylvania. With a metropolitan CSA population of 2,659,937, it is the largest in both the Ohio Valley and Appalachia and the 20th-largest in the U.S. Wikipedia