Purpose: Developmental language disorder (DLD) is common in early childhood and there may be an increased risk of co-occurring social, emotional, and behavioural problems related to the language problems of children. The aim of this study was to determine whether children with DLD experience more emotional and/or behavioural problems as compared to their typically developing peers. Method: A prospective case-control study design was used to perform a comparison between children with DLD and their typically developing peers. Thirty-eight Turkish children with DLD (mean age 38.21 months, standard deviation 8.15 months) and 30 Turkish children with typical language development (mean age 37.03 months, standard deviation 9.01 months) participated in the study. Result: The results of the analysis indicate that children with DLD have significantly higher scores for emotional reactivity, anxiety/depression, somatic complaints, withdrawnness, sleep problems, attention problems, and aggressive behaviours as compared with their typically developing peers. Conclusion: This study provides evidence to support children with DLD being at risk of other emotional and/or behavioural problems. An in-depth analysis of the behavioural characteristics of these children may be required to prevent and/or reduce the co-occurrence of other problems.