Yep they do. Ideally rear ones do too but you can cheat and just not replace the metal surround of the bearing (no idea on the official name) however this often means the bearing wears out quicker and needs to be replaced sooner than if done properly.
I would get them both done if noisy both ways, will be cheaper for a start I would think too and would be sods law you get one done and the other gets worse. I have a noisy front bearing too, the other is not noisy but still thinking of getting em both done as less hastle.