 mount orab is a village in brown county, ohio, united states. the population was 3,664 at the 2010 census. ==history== mount orab (previously known as mount oreb) was laid out in 1850. ==geography== mount orab is located at  (39.029613, -83.924918).{{cite web|url=http://www
Villages_in_Brown_County,_Ohio Villages_in_Ohio