Gleim Field (ICAO: FD81) is a private general aviation airfield located in Gainesville, Florida, United States. It is a small facility primarily associated with Gleim Publications, a well-known aviation training and test preparation company founded by Irvin Gleim. The airfield supports private and recreational flying activities and is not served by commercial airlines. It serves as a practical training resource connected to Gleim's aviation education programs, offering a real-world complement to the company's written and online materials.