Is there a way to edit your username on facebook?

[Robbie]

I want to be more private and change my username on facebook. I am in groups and want more anonymity.

[Ashley Kim]

yes there is Review your name standards
Click in the upper-right corner of any Facebook page and select Settings
Look for the Name setting and click Edit to the far right
Type in your name and save your changes.

[abraXus]

keep in mind that if you dont use your real name on facebook and someone reports you for it, they will suspend your account