Higher rates of socio-emotional difficulties for deaf and hard of hearing (DHH) children have been reported compared with their typical hearing (TH) peers. Nonetheless, there has to date been limited examination on this issue internationally and no such examination in the Republic of Ireland. In this study, data was collected from parents using an online survey which included the Strengths and Difficulties Questionnaire to examine the socio-emotional development of 113 DHH children aged 5–16 in the Republic of Ireland. The results were compared with data from typically hearing (TH) children obtained from a large longitudinal study of childhood in Ireland – the Growing Up in Ireland study. The findings demonstrate that the prevalence of socio-emotional difficulties among this cohort of children is over three times that of the general population of children in Ireland, with 42% of the sample demonstrating clinically significant problem scores. Furthermore, DHH children had elevated subscale scores for the four problem scales in the SDQ when compared against the TH sample. These differences were statistically significant and had a range of effect sizes from small to large. The subscale of most concern was the peer problems subscale where the DHH sample had mean scores that were roughly double those of the TH sample, with a large effect size found. Finally, bivariate analysis revealed that several background variables were associated with elevated difficulty scores for DHH children, namely male gender, poorer communicative competency, and presence of an additional educational need.