This study investigated peer and family influences on the behavioural adjustment of secondary school students in Uyo Senatorial District, Akwa Ibom State, Nigeria. A descriptive survey design was adopted, and a sample of 600 students was selected using a multitage sampling technique. Data were collected using a structured questionnaire based on a five-point Likert scale and analyzed using frequency, mean, and standard deviation. The findings reveled that peer influence significantly affected students’ behavioural adjustment, with a high grand mean of 3.68. Parenting style was found

to have a positive influence on behaviour (grand mean = 3.83), suggesting that supportive and

structured parenting enhanced behavioural outcomes. Family structure also showed a strong effect (grand mean =3.91), with students from stable homes demonstrating better behavioural adjustment.

Furthermore, gender differences were observed (grand mean = 3.87), with male students exhibiting

more aggressive behaviours and females showing greater emotional sensitivity. Additionally, peer pressure, poor parenting, and family instability were identified as major predictors of deviant

behaviour (grand mean = 3.94). The paper recommends that Parents should be encouraged to adopt

authoritative parenting styles characterized by warmth, effective communication, emotional support, monitoring, and consistent discipline, among other things.