Tough call without a State listed for Parkersburg and nine located in the US. One each in:
WV
IA
IL
GA
IN
MS
NC
OK and
OR.
The closest one should be in West Virginia at 164.03 miles. If...
The population of Parkersburg, West Virginia on December 15th 2011 is approximately 31,421. (Extrapolated from a 2000 US census population of 33,099 and a population of 31,492 on May 31st 2011.)