The neighbourhood social environment is increasingly recognised as an important determinant of quality of life for older adults. However, there is little research concerning this association in the highly urbanised and rapidly ageing population of Singapore. In this study, the associations between the neighbourhood cohesion, perceived characteristics of the neighbourhood social environment and quality of life for older Singapore residents were examined. Data were taken from a survey that included1000 older persons (aged 55 years and over) from three neighbourhoods. Participants were randomly selected from a Department of Statistics supplied sampling frame of eligible households. Surveyor assistants visited participants at home during January to March 2018 to complete a questionnaire. The questionnaire was administered as an interview and elicited information on socio-demographics, built environment, social environment, travel behaviour, activity participation, and health status. Multilevel models were used to test neighbourhood cohesion and perceived characteristics of the social environment as predictors of quality of life (measured by the CASP). The survey is one component of a large programme of work on Innovative Planning and Design of Age-friendly Neighbourhoods in Singapore (2017-2019). The study was approved by the Singapore University of Design Institutional Review Board.