Background: Nursing interventions that aim to enhance the family environment are necessary to help single-parent families with children to improve family functioning. The cultural and social factors that are unique to Japan’s remote islands should be considered to assess the influence of this unique setting on family functioning. Purpose: The objectives of this study were to evaluate the family functioning of child-rearing single-parent families living in different environments and to investigate the association between family demographics and family functioning. Methods: A self-administered questionnaire, the Japanese version of the Survey of Family Environment,was used to evaluate the sufficiency of family functioning. The participants were families with children enrolled in nurseries and kindergartens who were either living in remote, rural islands or in an urban city on the mainland in Japan. Results: Family functioning was significantly higher for singleparent families living on the islands than for those living in the city in terms ofmedia use, participation in community activities, and the collaboration of familymembers in child-rearing. Family functioning of single-parent families correlated significantly with household income, the parent’s gender, familymembers’ health, and family life cycle. Conclusions/Implications for Practice: Single-parent families living on Japanese offshore islands maintained family functioning through mutual support and the effective use of information technology. Nevertheless, single-parent families require additional support to improve their healthcare and financial situations.