Previous research has shown that gender affects social support and post-traumatic stress disorders (PTSD). The present study explores the main and interaction effects of gender and place of settlement on social support, PTSD symptoms, and insomnia in internally displaced adolescents (IDAs) in North-east of Nigeria. A stratified sampling method was used to select 109 participants from IDAs living in the camp, while 27 additional IDAs were purposively recruited from those living in the host community. Participants completed measures of Harvard Trauma Questionnaire Part-II, Insomnia Severity Index, and Crisis Support. No significant effects of gender on perceived social support, PTSDs, and insomnia were observed. Place of settlement had a significant effect on social support, with IDAs living in the camp having a higher mean score, while place of settlement had no significant effects on PTSD and insomnia. A significant interaction effect of gender and place of settlements on insomnia was found, with males living in the community having a higher mean score than their female counterparts, as well as both males and females in the camp. In conclusion, there is a need to understand male IDAs who reside in non-camp settings better, including the nature of their challenges, the outcomes they desire, and the limitations they experienced.