Williamson, WV has a population of 3,036 and is the 8,757th largest city in the United States. The population density is 927 per sq mi which is 1111% higher than the West Virginia average and 923% higher than the national average. The median age in Williamson is 45 which is approximately 7% higher than the West Virginia average of 42. In Williamson, 49% of the population over 15 years of age are married, 99% speak English and 0% speak Spanish. 54% of Williamson residents were born in West Virginia, 45% were born out of state, 0% were born outside of the United States and 1% were foreign born.