The focus of present study is immigrant their livelihood and integration in Bahawalpur City. The nature of migration depends on the requirement and intensity of immigrants. Migration into Bahawalpur City is based to improve standard of living and to alleviate poverty among immigrants. Bahawalpur City was headquarter of the princely state, and has many opportunities, facilities which attract population from most of the places of Punjab Province and well as other parts of the country. Present study deals with migration to Bahawalpur City, livelihood and marriage integration. The study divided into four chapters. Chapter I explains problems, migration, objectives and methodology. Chapter 2 presents the structure of migrant population in Bahawalpur District and City. Chapter 3 deals with profile of the migrant population in Bahawalpur City of the surveyed population. Analysis of immigrants has done from various places of Punjab Province and other areas too in eight phases. Chapter 4 present livelihood and marriage integration of migrant population with local population of Bahawalpur City and result of analysis of marriage integration