The ashy roundleaf bat (Hipposideros cineraceus) is a species of bat in the family Hipposideridae found in Bhutan, Cambodia, India, Indonesia, Laos, Malaysia, Myanmar, Nepal, Pakistan, Thailand, and Vietnam.
It was described as a new species in 1853 by English zoologist Edward Blyth. The holotype had been collected by William Theobald near the Salt Range in Bhera, Pakistan. Its species name "cineraceus" is derived from Latin "'," meaning "ashen." Blyth described parts of its fur as "greyish-white."
It is a small species of bat, with individuals weighing . Its forearm length is . It has a simple nose-leaf with a raised bump on the nasal septum.
It roosts in sheltered places such as caves during the day.
Its range includes several countries in South and Southeast Asia. It has been documented in Cambodia, India, Indonesia, Laos, Malaysia, Myanmar, Pakistan, Thailand, and Vietnam. It has been documented at a range of elevations from above sea level.
As of 2019, it is assessed as a least-concern species by the IUCN.