Parkersburg is a city in and the county seat of Wood County, West Virginia, United States. Located at the confluence of the Ohio and Little Kanawha rivers, it is the state's third-largest city and the largest city in the Parkersburg-Marietta-Vienna metropolitan area. The population was 31,492 at the 2010 census. Its peak population was 44,797 in 1960. The city is about 14 miles south of Marietta, Ohio.

What is the population of parkersburg west virginia? Okie... think carefully first, then make a decision:
The relevant sentence in the passage is: The population was 31,492 at the 2010 census. So, the answer is 31,492.