Everyone’s talking about saving America’s middle class. But just who exactly falls into this group?

That’s actually a much more difficult question to answer than it seems. While some experts define the middle class by income, others define it by lifestyle. Still others say it’s a state of mind.

Here are five different ways that economists, federal agencies and even the White House measure and characterize the middle class.

What is middle class, anyway? Click HERE to learn more

Are you middle class? Are you considered middle class where you live? Use this calculator to find out CNNMoney/calculator