Lake Morton-Berrydale, WA has a population of 10,742 and is the 3,741st largest city in the United States. The population density is 874 per sq mi which is 804% higher than the Washington average and 865% higher than the national average. The median age in Lake Morton-Berrydale is 44 which is approximately 17% higher than the Washington average of 38. In Lake Morton-Berrydale, 67% of the population over 15 years of age are married, 92% speak English and 2% speak Spanish. 58% of Lake Morton-Berrydale residents were born in Washington, 34% were born out of state, 1% were born outside of the United States and 7% were foreign born.