Camp Half-Blood has many cabins for the different demigods. There are twelve main cabins (Cabins 1-12) for children of the Olympians, while there are countless more, built for unclaimed children of minor gods. These were built after the events of The Last Olympian. The twelve main cabins are placed in a horseshoe shape, also similar to an omega.
But for everyone's benefit on the forum Demigod Power, a cabin for each god is made. There are currently thirty-five known cabins for the major and minor gods.