The extent of parental knowledge is an important factor in the care of children with congenital heart disease (CHD), with research recommending that to achieve optimal care, parents should be appropriately educated in the condition. This literature review aimed to identify the factors that influence parents’ knowledge of their child’s CHD. Relevant databases were searched for literature using appropriate search terms. Thematic analysis identified four common themes in six articles: the educational technique used, the parents’ educational background, effective communication and the source of information. The findings identified a need for improved delivery and communication of parental education.