This study reports the association between parental uncertainty and characteristics of 123 parent–child dyads prior to the child’s herniorrhaphy. A cross-sectional study design and Mishel’s Parents’ Perception of Uncertainty Scale (PPUS) were used. Parent participants were married (98%), had a university degree (45%), identified with a religion (77%), and worked (69%). More boys (76%) than girls (23%) underwent herniorrhaphy (average age = 2.26 years); 60% were the first-born child and 25% were premature. More children presented with unilateral (63.4%; right = 44.7%, left = 18.7%) than bilateral (36.6%) hernias and most were primary (98%). Overall uncertainty was perceived as moderate and ambiguity had the highest score. Religion, birth order (first child), and hernia site (bilateral) explained 20.6% of total variance of uncertainty. Providing information about postoperative symptom and pain management is important for all parents, particularly for parents identified with a religion and whose first-born child had bilateral hernias.