ObjectivesThe objective of this study was to investigate secular trends in adolescent health status and healthcare consultations. Study designThe design of this study is cross-sectional comparisons of population survey outcomes. MethodsCanadian national population data from 2007 to 2016 (T1 N = 14,223; T2 N = 14,247; T3 N = 13,532; T4 N = 13,184; T5 N = 11,122; Total N = 66,308) were examined to find trends in health diagnosis (chronic illnesses and mental disorders) and healthcare consultation (general health practitioners and mental health professionals). Controlling demographics, Multivariate analysis of covariances (MANCOVAs) and correlations were carried out to compare differences by age group (A1: 12–14 years N = 25,180; A2: 15–17 years N = 25,825; A3: 18–19 years N = 15,303) and gender (girls N = 32,388; boys N = 33,920) across survey years. ResultsSteady increases were found in diagnosed mental disorders and consultations with a mental health professional (MP) for girls, while chronic illnesses remained stable and general practitioner consultations declined for all adolescents over these years. Gender disparity in MP consultations grew with age, much more in recent years, whereas chronic illness diagnoses curved down for all in midadolescence. More integrated relations between health status and healthcare utilization were noted in T5 than in T1. ConclusionsDifferential secular trends were shown for adolescent physical versus mental health statuses and relevant healthcare consultations. Although girls' and older adolescents’ mental health declined over the years, a positive direction was also found for improved awareness of mental health.