Islamic values are among the topics that are considered by people in an Islamic society in human and organisational life and paying attention to them can have positive consequences for the individual and the organisation. The purpose of this study is to investigate the effect of Islamic values on citizenship behaviours of Muslim citizens. The research is applied in terms of purpose and descriptive-survey in terms of nature and method. The statistical population of this research includes 2600 Muslim employees of (...) 45 manufacturing Indonesian organisations in 2021. The sample size was estimated to be 335 by simple random sampling. The data collection tool of this study is a questionnaire. The validity of questionnaire was confirmed by confirmatory factor analysis and reliability by Cronbach's alpha coefficient; further, data analysis was performed using linear structural relationships (LISREL) software. The results of structural equations modeling showed that Islamic values have a positive and significant effect on citizenship behaviours of Muslim citizens (p = 0.78; T-Value= 8.62). CONTRIBUTION: The results showed that paying attention to Islamic values in the organisation contributes to citizenship behaviours of people. Therefore, it is suggested that Islamic values be the basis of staff activities and employees who are more committed to these values in the organisation should be encouraged by the management of organisations. (shrink)