Lake Tapps, WA has a population of 13,030 and is the 3,203rd largest city in the United States. The population density is 1,056 per sq mi which is 992% higher than the Washington average and 1066% higher than the national average. The median age in Lake Tapps is 39 which is approximately 2% higher than the Washington average of 38. In Lake Tapps, 60% of the population over 15 years of age are married, 98% speak English and 0% speak Spanish. 59% of Lake Tapps residents were born in Washington, 37% were born out of state, 1% were born outside of the United States and 3% were foreign born.