As COVID-19 dramatically changes human social life, restrictive lockdown periods to slow the spread of the virus have been suggested to particularly affect the psychological well-being of children and their families. To capture lockdown-related effects on a large scale, the present study used an online questionnaire completed by parents of 3-10-year-olds during the most restrictive lockdown period in Germany thus far (N = 2,672). Parents reported their stress level, their child’s well-being, and their child’s problem behaviors among others. Results showed that most parents and children experienced lockdown-related stress. Concerning children, not being able to meet with friends and family members outside the household emerged as the primary challenge. Older children (7–10 years) evidenced more emotional symptoms as well as less conduct problems and hyperactivity than younger children (3–6 years). Children’s own and their parents’ stress level, the degree to which children missed other children, and children’s age all showed to be negatively related to children’s general life satisfaction. Single parenthood and being an only child were associated with higher levels of child problems. Taken together, these findings shed light on the psychological well-being of children and their families during governmental lockdown measures, as well as on relations between children’s coping and demographic background. They have implications for possible avenues for interventions, inter alia by encouraging policies that facilitate the maintenance of social relationships and focus particularly on children from single parent families, on only children as well as on families in challenging housing situations.

As COVID-19 dramatically changes human social life, restrictive lockdown periods to slow the spread of the virus have been suggest to particularly affect the psychological well-being of children and their families. To capture lockdown-related effects on a large scale, the present study used an online questionnaire completed by parents of 3-10-year-olds during the most restrictive lockdown period in Germany thus far (N = 2,672). Parents reported their stress level, their child’s well-being, and their child’s problem behaviors among others. Results showed that most parents and children experienced lockdown-related stress. Concerning children, not being able to meet with friends and family members outside the household emerged as the primary challenge. Older children (7-10 years) evidenced more emotional symptoms as well as less conduct problems and hyperactivity than younger children (3-6 years). Children’s own and their parents’ stress level, the degree to which children missed other children, and children’s age all showed to be negatively related to children’s general life satisfaction. Single parenthood and being an only child emerged as potential risk factors for children’s well-being. Taken together, these findings shed light on the psychological situation of children and their families during governmental lockdown measures, as well as on relations of children’s coping and demographic background. They have implications for possible avenues for interventions, inter alia by encouraging policies focusing on children from single parent families, on only children as well as on families in difficult housing situations.