LOC is the file extension used in GPS satellite navigation systems. A LOC file stores information about specific locations. Defining points with the help of LOC files allows for easy management of places important for the user on the map or the route. They can be called POIs, intermediate points of the mapped route or other points of interest.

LOC files can be used to exchange data between GPS systems. Technically, these are plain text files containing source code in a markup language XML.