This study aimed at determining the influence of parental involvement on psychosocial wellbeing of adolescents in Kandara, Murang?a County, Kenya. The objective was to determine the extent to which in parental availability influences the psychosocial wellbeing of adolescents. Theories used were Erikson?s Theory of psychosocial stages of Development (Macleod,2012) and Brofenbrenner?s Ecological Systems Theory (Guy-Evans,2020). Target population was 16,280 adolescents with a sample size of 390 adolescents from 18 secondary schools, 18 parents and 18 teacher counselors selected through random systematic sampling. The study employed descriptive survey research design, SPSS version 26 was used in data analysis, chi square test statistics used to test the null hypothesis at ? = 0.05. Descriptive statistics was used in analyses of the quantitative data and results expressed in percentages and frequencies and findings presented in graphs and tables and quantitative data was analyzed thematically. Finding showed a significant relationship between parental availability and adolescent?s psychosocial wellbeing 0.000