Nucleon Instability in SUSY Models

A review of the current status of nucleon stability in SUSY unified models is given. The review includes analysis of nucleon stability in the minimal SU(5) supergravity model, and in extensions of the minimal model such as SO(10) models, and models including textures. Implications of the simultaneous constraint of the experimental limit on the proton lifetime and the constraint that dark matter not overclose the universe are also discussed.