Willapa, WA has a population of 251 and is the 23,399th largest city in the United States. The population density is 903 per sq mi which is 834% higher than the Washington average and 897% higher than the national average. The median age in Willapa is 52 which is approximately 38% higher than the Washington average of 38. In Willapa, 83% of the population over 15 years of age are married, 100% speak English and 0% speak Spanish. 57% of Willapa residents were born in Washington, 43% were born out of state, 0% were born outside of the United States and 0% were foreign born.