Chico, WA has a population of 2,463 and is the 9,939th largest city in the United States. The population density is 1,075 per sq mi which is 1012% higher than the Washington average and 1086% higher than the national average. The median age in Chico is 48 which is approximately 28% higher than the Washington average of 38. In Chico, 68% of the population over 15 years of age are married, 86% speak English and 4% speak Spanish. 26% of Chico residents were born in Washington, 57% were born out of state, 2% were born outside of the United States and 15% were foreign born.