In this research, it is aimed to describe the loneliness levels of the adolescents who are living in an orphanage, and examine the impact of internet addiction and some variables. 47 male adolescents in Çankırı 100th Year Orphanage were included in the sample of the research. In data collection “Adolescent Identification Form”, “Internet Addiction Scale” developed by Günüç (2009), and “UCLA Loneliness Scale” developed by Russell, Peplau and Ferguson (1978) and its validity and reliability studies made by Demir (1989) were used. In the evaluation of data t test and one way ANOVA were used. When the loneliness level of the adolescent was examined, it was seen that 68,1% of them were having medium level, 31,9% were having low level loneliness and the point average of their loneliness was 45,49±8,03 (medium). Their internet addiction level was medium in 66% of them; low in 17% and high in 17%, and point average of internet addiction level was 90,21±27,89 (medium). As a result of the analysis, it was determined that the loneliness point average of the adolescents who were between 13-15 years old, who were not satisfied with friendship relations at all, who did not have any close friends was high (p<0,05).