The Pituitary Gland is located in a small bony cavity at the base of the brain.  A stalk links the pituitary to the hypothalamus, which controls release of pituitary hormones.

The location and roles of the hypothalamus and pituitary glands.  Images from Purves et al., Life: The Science of Biology, 4th Edition, by Sinauer Associates (www.sinauer.com) and WH Freeman (www.whfreeman.com)