A body worn proximity sensing and alerting device for maintaining personal space includes a housing, which defines an interior space. A fastener is engaged to a first face of the housing and can selectively engage a user so that the housing is removably engaged to the user. A battery and a microprocessor are engaged to the housing and are positioned in the interior space. An alert module is engaged to the housing. A sensor is engaged to a second face of the housing. The microprocessor is operationally engaged to the battery and is communicatively engaged to the alert module and the sensor. The sensor performs proximity detection and communicates detection events to the microprocessor. The microprocessor selectively actuates the alert module to alert the user of detection events, facilitating the user in maintaining their personal space and distance from others.