Objective: To examine the co-location of childcare centres and their outdoor play spaces with car parks in Melbourne and Sydney, Australia. Methods: The co-location of childcare centre outdoor play spaces and car parks was examined through measurement of horizontal and vertical distances using Google Earth Pro satellite imagery. Results: One hundred and forty-two childcare centres were studied in Melbourne, with 133 accompanying car parks identified. Eighty-one (57.0%) centres had a significant size car park within 150 m and 43.7% had a car park within 100 m. Twenty car parks (15.0%) were found within 10 metres of childcare centres, of which 12 (9.0%) had more than 100 spaces. Twenty centres were examined in Sydney, with 31 associated car parks identified. Eighteen childcare centres (90.0%) had car parks within 150 m and 17 (85.0%) had car parks within 100 m. Conclusion: Australian childcare centres are located too close to car parks exposing children to pollution and likely impacting the development of chronic respiratory disease. Traffic pollution is an avoidable risk that must be considered when planning childcare centre location. Implications for public health: The co-location of childcare centres with large-scale car parks may have long-term impacts on the respiratory health of Australian children under the age of five.