Buffalo, WV has a population of 1,300 and is the 13,554th largest city in the United States. The population density is 929 per sq mi which is 1155% higher than the West Virginia average and 925% higher than the national average. The median age in Buffalo is 42 which is approximately 1% higher than the West Virginia average of 42. In Buffalo, 63% of the population over 15 years of age are married, 100% speak English and 0% speak Spanish. 87% of Buffalo residents were born in West Virginia, 13% were born out of state, 0% were born outside of the United States and 0% were foreign born.