Introduction: Reactive hyperplastic lesions which occur as a result of chronic irritation of the mucosa of the oral cavity are common lesions faced by dentists during routine examinations. Aim: The aim of this study was to assess the prevalence and sociodemographic distribution of reactive hyperplastic gingival lesions (RHLs) among the paediatric age group (0-18 years) over a period of 10 years (2010 to 2020). Materials and Methods: In this retrospective study, records procured from the archives of the Department of Oral Pathology and Oral Medicine, Faculty of Dentistry, Lagos State University College of Medicine, Nigeria over a period of 10 years (2010 to 2020) were reviewed. Information relating to the type of reactive lesion, age, gender and specific gingival location was extracted and recorded on data forms. Data was analysed using SPSS (version 21). Results: Paediatric RHLs constituted 13.5% of all lesions seen in childhood within the study period. They accounted for 14.4% of all RHLs in all ages. Pyogenic granuloma was the commonest RHL accounting for 57.9%, followed by peripheral ossifying fibroma (21.1%), least seen was peripheral giant cell granuloma. RHLs were most prevalent in the permanent dentition stage (73.7%). Female predominance was observed, with the upper and lower buccal gingiva presenting as the sites of predilection. 52.6% of lesions were sessile. Most RHLs were associated with non-mobile teeth and non-recurrence. Conclusion: The prevalence of RHLs in childhood was 13.5% with pyogenic granuloma being the most prevalent type. There was a predilection for permanent dentition age (13-18years) and female gender though not significantly associated. RHLs occurred more frequently in the upper and lower buccal gingivae.