Cyber stalking is a relatively new kind of cyber terrorism crime. Although it often receives a lower priority then cyber terrorism it is an important global issue. Due to new technologies, it is striking in different forms. Due to the Internets provision of anonymity and security it is proliferating quickly. Technology and tools available to curb it have many limitations and are not easy to implement. Legal acts to protect people from cyber stalking are geographically limited to the concerned state or country. This chapter reviews cyber stalking, its approaches, impacts, provision of legal acts, and measures to be taken to prevent it. There is an immediate need for research in the various dimensions of cyber stalking to assess this social problem.