When is the North Star visible and what other constellations are visible at the same time?

Polaris, or the North Star, is always visible in the Northern Hemisphere. The entire sky rotates around it during the night. The Big and Little Dipper aka Big and Little Bear are visible, as Polaris is a part of the Little Dipper. Draco, Casseopia, and Capheus are also formations normally visible around the North Star. The other constellations vary with the seasons, see the star chart referenced.