The concepts and technologies disclosed herein are directed to automated tool tracking for service technicians. According to one aspect disclosed herein, a tool tracking system can collect tool data from a vehicle system of a vehicle. The tool data can be associated with a tool that is to be utilized by a service technician to provide, at least in part, a service at a customer location. The tool tracking system can store the tool data in a data store. The tool tracking system can map the tool data to the vehicle and can determine when the tool is no longer mapped to the vehicle. This can be indicative of the tool having been left, for example, at the customer location. The tool tracking system can create an alert to inform the service technician and/or another entity that the tool is no longer mapped to the vehicle.