Monaragala is a district in Uva Province of Sri Lanka. It is the second largest of the 25 districts in Sri Lanka, with an area of 5,636 km. Budā¦Monaragala is a district in Uva Province of Sri Lanka. It is the second largest of the 25 districts in Sri Lanka, with an area of 5,636 km. Buddhism is the predominant religion in Moneragala.