Objectives The aims of the present study were to: (1) describe the health status and health indicators for urban Aboriginal children (age 0-16 years) in south-east Sydney; and (2) evaluate the quality of routinely collected clinical data and its usefulness in monitoring local progress of health outcomes. Methods Aboriginal maternal and child health routine data, from multiple databases, for individuals accessing maternal and child health services between January 2007 and December 2012 were examined and compared with state and national health indicators. Results Reductions in maternal smoking, premature delivery and low birthweight delivery rates were achieved in some years, but no consistent trends emerged. Paediatric services had increased referrals each year. The most frequent diagnoses were nutritional problems, language delay or disorder and developmental delay or learning difficulties. Twenty per cent of children had a chronic medical condition requiring long-term follow-up. Aboriginal children were more likely to be discharged from hospital against medical advice than non-Aboriginal children. Routinely collected data did not include some information essential to monitor determinants of health and health outcomes. Conclusions Aboriginal children living in this urban setting had high levels of need. Routinely recorded data were suboptimal for monitoring local health status and needed to reflect national and state health indicators. Routinely collected data can identify service gaps and guide service development. What is known about this topic? Despite improvements in some areas, there continue to be significant gaps in maternal and child health outcomes between Aboriginal and non-Aboriginal Australians. These are poorly documented at a local service level. What does this paper add? Intensive, local services offered to Aboriginal women and children can result in rapid service engagement. Health service data routinely collected by local services can be used to demonstrate reductions in antenatal risk factors in pregnant Aboriginal women, even within the short time frame of 6 years. However, improvements in child health outcomes may require longer time frames. In this urban setting, the most frequent diagnoses in Aboriginal children attending the service were nutritional problems, language delay or disorder and developmental delay or learning difficulties. What are the implications for practitioners? Key information regarding determinants of health should be routinely monitored at a local level to understand local rates and health needs in addition to evaluating and quantifying the effectiveness of service delivery or health promotion activities.