Is it normal for a girl to have hair on her stomach?

Yes, you should have hair all over your body, although sometimes it is not easily seen by the human eye, it really depends how dark your skin color is, if your pale, the hair on your stomach might seem to be darker than other girls, and if you are genetically dark haired, than your body hair should also be more visible than others. I'm very pale, and I have light brown hair, and the hair on my stomach is VERY visible, so yes, it is normal, but if it gets really bad, you might want to ask your docter about it.