Am I now Middle Class?

[Nuvendil]

Depends on a lot of outside factors:

Where do you live?
Do you have a family?
If so, how large?

I mean, if you're single and living in North Carolina outside of the major urban areas, 50k a year is a healthy living and comfortably within the lower half of the middle class demographic.  If you are living with a spouse and it's just the two of you, 50k is still ok.  When kids come into the picture, starts getting tight.  In New York, you will feel the squeeze a lot more.