Abstract Wireless sensor network (WSN) technology refers to a group of sensors used for monitoring and recording the physical conditions of the environment and organizing the collected data at a central location. This sensor network can include thousands of smart sensing nodes with processing abilities that are powered by a dedicated battery. A WSN consists of a tiny wireless computer that communicates environmental stimuli, including vibrations, light, and temperature. It is an integral part of such domains as industry, health care, infrastructure, and research and development. As it relates to health care, a WSN can diagnose abnormal conditions in a patient, issue alarms and alerts, and send electronic mail to healthcare providers. This chapter is a discussion of the applications of WSNs in the healthcare industry.