Microleter is an extinct genus of parareptile which existed in Oklahoma during the Early Permian period. It was first named by paleontologists Linda A. Tsuji, Johannes Muller, and Robert R. Reisz in 2010. The type species is Microleter mckinzieorum. A very well preserved skull and lower jaw is the only known specimen. It was found from the Early Permian (early Kungurian stage) fissure-fill deposits near Richards Spur in Comanche County, often referred to as the Fort Sill locality. The Fort Sill locality has yielded many other well preserved tetrapod fossils, including those of other parareptiles such as Bolosaurus, Colobomycter, and Delorhynchus.