Migration has now become one of the key developmental issues facing Nigeria as its citizens have increasingly opted to consider moving abroad for better socioeconomic gains. This study explored the propensity of Nigerian citizens to move internationally as well as the primary causes of such intentions. The research utilized a descriptive quantitative methodology based on data gathered from 5,315 Nigerian respondents. The analysis was done through frequencies and percentages that were used to describe the socio-demographic profile, willingness to move internationally, and reasons for intending to migrate. It was found out that approximately 55% of respondents were willing to move abroad, thus implying considerable propensity to migration among the Nigerian citizens. Willingness to move internationally did not differ much for both sexes, but varied in relation to age and geopolitical zones. The findings further indicated that better employment chances were the main cause for considering relocation, followed by economic advantages. Providing better living conditions to children was another important motivation, whereas better governance, conducive business environment, education, security, and healthcare were additional reasons. This indicates that economic and job situations are critical to the migration aspirations of Nigerians. Although international migration can create advantages for countries in terms of remittances, skill transfer and networks, continuous outmigration from such a country could result in brain drain and thus have negative effects on the development of that country. The research calls for improved job and business situations and creation of an environment that makes it worthwhile for Nigerians to make sustainable livelihood within their own country. Keywords: International migration; migration intention; Nigeria; migration aspiration; national development.