The increasing population growth which makes residents look for new land to live in both as a place to live and also a place to make a living has made many new settlers clear land in the Tesso Nilo National Park area without permission from the government, even though the Tesso Nilo National Park area is not allowed opening settlements and also opening plantation areas which currently have very many oil palm plantations in the area.Uncontrolled population growth due to easy access to “in-migration” to the TNTN location has resulted in increasingly severe forest destruction. The migrants who come to the TNTN area are generally tough farmers who come from various ethnic groups such as Javanese, Batak, Palembang, even now there are Toro Bali. This research aims to look at Population Migration in Toro Jaya Hamlet, in the TNTN Area and the Impact of Population Migration on Forest Damage in the TNTN Area.This research uses a qualitative approach. The research location is a forest area in the Tesso Nilo National Park which has become a settlement for residents.Key Research informants were selected by specifying (purposive) then using snow ball sampling technique for determining the next informant.The method of data collection was done by means of in-depth interviews, focus group discussions, documentation. Then the data were analyzed based onInteractive analysis model. The results show that the population migration in TNTN has increased significantly, coupled with the birth rate of the population, who are mostly couples of productive age, have made fertile land for population growth in TNTN. The smooth accessibility with the entry of public transportation vehicles (buses) to TNTN, especially Dusun Toro Jaya, coupled with the production of their “oil palm” plantation crops have also become a pull factor for many people to migrate to TNTN. This migration of the population has resulted in forest encroachment into residential areas and oil palm and rubber plantations. The encroachment will have an impact on the destruction and loss of native forest from Tesso Nilo National Park.Keywords: Population, migration, forest destruction