Waller, WA has a population of 7,965 and is the 4,700th largest city in the United States. The population density is 1,005 per sq mi which is 940% higher than the Washington average and 1010% higher than the national average. The median age in Waller is 46 which is approximately 22% higher than the Washington average of 38. In Waller, 61% of the population over 15 years of age are married, 93% speak English and 2% speak Spanish. 66% of Waller residents were born in Washington, 28% were born out of state, 1% were born outside of the United States and 4% were foreign born.