Edison, WA has a population of 135 and is the 26,055th largest city in the United States. The population density is 235 per sq mi which is 143% higher than the Washington average and 160% higher than the national average. The median age in Edison is 40 which is approximately 7% higher than the Washington average of 38. In Edison, 79% of the population over 15 years of age are married, 100% speak English and 0% speak Spanish. 58% of Edison residents were born in Washington, 32% were born out of state, 0% were born outside of the United States and 10% were foreign born.