Enga refers to both an ethnic group located in the highlands of Papua New Guinea

Papua New Guinea

Papua New Guinea , officially the Independent State of Papua New Guinea, is a country in Oceania, occupying the eastern half of the island of New Guinea and numerous offshore islands...

 and the province in which they are the majority ethnic group.
Enga is the highest and is the second most rugged province (after Simbu Province

Simbu Province

Simbu, also known as Chimbu, is a Highlands Region province in Papua New Guinea. The province has an area of 6,100 km² and a population of 259,703 . The capital of the province is Kundiawa...

) in Papua New Guinea. It covers an area of 12,800 km². Much of the province is at altitudes of over 2000 meters. Lower altitude areas are typically valleys which form the watershed for the two major river systems that drain the province, the Lagaip (which is a tributary of the Fly

Fly River

The Fly at , is the second longest river, after the Sepik, in Papua New Guinea. The Fly is the largest river in Oceania, the largest in the world without a single dam in its catchment, and overall ranks as the twenty-fifth largest river in the world by volume of discharge...

) and the Lai

Lai River

The Lai River is a river of Thailand. It is a tributary of the Yom River, part of the Chao Phraya River basin.-See also:*Tributaries of the Chao Phraya River...

 (which is a tributary of the Sepik).
The Papua New Guinea census of 2000 lists the population of Enga at 295,031 people, although the accuracy of the census is questionable.