Horvath's Rock Lizard populates an isolated range in the South-Eastern Alps / Northern Dinaric Mountains. The fact that its closest relatives are the Pyrenean Rock Lizard species is noteworthy: It may indicate that the genus Iberolacerta had been more widespread in the past but is currently pushed to some local refugia.
Although Iberolacerta horvathi lives in montane habitats up to 2000 meters in south of its range, it may not be regarded as a high altitude species. This also suggests that Iberolacerta species may not be generally restricted to high-altitude mountain habitats, unless they are forced by competitive pressure (e.g. by Podarcis species which have benefited from the current postglacial warm climate.
Within its distribution area, Iberolacerta horvathi co-occurs with the following species: