This paper examines the determinants of individual attitudes toward immigrants, both economically and non-economically, using two individual-level survey datasets covering a wide range of developed and developing countries. The analysis reveals a strong empirical regularity: individuals with higher levels of education are more likely to be pro-immigration in high per capita GDP countries and less likely in low per capita GDP countries. This relationship is attributed to labor market concerns, with the impact of education on pro-immigration preferences being positive in rich countries and negative in poor countries. The findings are consistent with the predictions of the Heckscher-Ohlin model and the factor-proportions-analysis model, suggesting that individual attitudes are influenced by changes in the relative supply of skilled and unskilled labor due to immigration. Non-economic factors, such as security and cultural issues, also affect attitudes but do not significantly alter the economic explanations. The paper concludes by discussing the implications of these findings for understanding international migration flows and the role of individual preferences in shaping immigration policies.This paper examines the determinants of individual attitudes toward immigrants, both economically and non-economically, using two individual-level survey datasets covering a wide range of developed and developing countries. The analysis reveals a strong empirical regularity: individuals with higher levels of education are more likely to be pro-immigration in high per capita GDP countries and less likely in low per capita GDP countries. This relationship is attributed to labor market concerns, with the impact of education on pro-immigration preferences being positive in rich countries and negative in poor countries. The findings are consistent with the predictions of the Heckscher-Ohlin model and the factor-proportions-analysis model, suggesting that individual attitudes are influenced by changes in the relative supply of skilled and unskilled labor due to immigration. Non-economic factors, such as security and cultural issues, also affect attitudes but do not significantly alter the economic explanations. The paper concludes by discussing the implications of these findings for understanding international migration flows and the role of individual preferences in shaping immigration policies.