How noisy are chickens?

Chickens aren't noisy at all unless something is trying to get them, and roosters aren't actually that noisy either unless you have a bunch of them. Like everyone said though, just make sure that where you live allows chickens because not all places do & if you're planning on getting eggs out of them, make sure you have laying hens for that or the eggs won't stay good & keep the roosters away from them. Trust me, I've owned plenty of them, you don't want a fertilized egg to eat!