Here's the minimum annual income required to be middle class in WA

What Is Middle Class Income? Thresholds, Is It Shrinking?

What is considered middle class in Washington state? See income ranges across the country

A Brief History Of America's Middle Class

Salary you need to be considered middle class in every US state

10 Differences Between Middle Class And Rich People - LifeHack

6 Signs That You've Made It to the Middle Class

How much money you need to make to be middle class in the 10 biggest U.S. metro areas