Nationalism is one of the fundamental things for the development of a country since it influences the strength of the country. Over a few decades, the problems of nationalism have been experienced by several countries. This study aims to investigate the attitudes of Indonesian nationalism by using a survey method employing the quantitative data. The researcher distributed questionnaires about how Indonesians reflect their nationalism based on 4 aspects of nationalism; love of the homeland, sacrifice willingness, unity and never give up. The questionnaire consisted of 12 statements using a four-Likert scale to indicate Indonesian nationalism. This study involved 100 respondents; between 18-40-years-old. The study reveals that Indonesian citizens show their attitude towards indicators of nationalism: proud to be Indonesian, learning Indonesia history, volunteering, donating alms, respecting differences, deliberation, caring for NKRI, sincerity, optimistic as well as endurance. Meanwhile, the non-nationalism attitudes are reflected from the indicators of using Indonesian products and serving in the remote area around Indonesia.