In 2013, Dornan was made the patron of TinyLife, a Northern Ireland charity for premature and vulnerable babies. In 2016, he appeared in a skit for Children in Need, BBC's annual charity event to help disadvantaged children in the UK. In 2017, he joined other celebrities for a charity football match, Game 4 Grenfell, to provide aid to the victims of Grenfell Tower fire in West London that year. In the same year, he collaborated with the Juvenile Diabetes Research Foundation (JDRF) in a charity dinner to raise funds to help the JDRF support children diagnosed with type-1 Diabetes.