Background: Not much is known about reciprocal prospective within-person effects between various coping strategies or between coping strategies and well-being in minors. Aims: Therefore, we used a random intercept cross-lagged panel model (RI-CLPM) with four-time points spaced 6 months apart to analyze how five coping strategies (seeking social support, problem-solving, avoidant coping, palliative emotion regulation, anger-related emotion regulation) were associated with each other and with well-being. Method: The sample comprised 702 minors. Their age at Time 1 was 10.30 years ( SD = 1.35; range: 8–14). Results: On the between-person level, problem-solving and palliative emotion regulation were positively related to well-being, whereas anger-related emotion regulation was negatively related. Among the coping strategies themselves, anger-related emotion regulation and problem-solving were positively correlated with seeking social support, and problem-solving and seeking social support were negatively correlated with avoidant coping. At the within-person level, avoidant coping was negative, and seeking social support was positively bidirectionally associated with well-being. Additionally, well-being positively influenced problem-solving, and seeking social support was positively and avoidant coping was negatively bidirectionally associated with problem-solving. Limitations: Due to the 6-month interval, statements are limited to only this time period. Furthermore, whereas we controlled for time-invariant covariates, we did not control for time-varying covariates. Conclusion: The findings underscore the importance of simultaneously examining different coping strategies along with well-being in a within-person design. Understanding the links between coping and well-being can contribute to the development and use of interventions promoting minors’ coping and well-being.