Why is the Mental Health of the Youngest American Workers in Decline?

The worsening mental health of young workers in the United States drives the disappearance of the U-shape in wellbeing and the hump-shape in illbeing in the last decade. Illbeing declines in age among workers but is hump-shaped among non-workers across all US states. This has been the case for some time and is apparent in our analyses of two large US datasets with long time runs - the Behavioral Risk Survey System 1993-2025 and the National Health Interview Survey of 1997-2024. Although the mental health of workers and non-workers has been declining it has been deteriorating most quickly among young workers, leading to a steepening in the age gradient of mental illbeing for workers. Improvements in worker wellbeing (and declines in worker illbeing) with age are mirrored in age differences in reported working conditions in the American Job Quality Survey of 2025: six measures of job quality rise with age. Declines in mental health are most pronounced among the youngest workers ages 18-22 who are likely drawn from lower socio-economic classes and report the greatest difficulties making ends meet.