Integration of immigrants is at the forefront of policy concerns in many countries. Simultaneously, there is an increasing focus on the role of the receiving society for achieving a higher degree of integration of immigrants. In recent decades, the successful integration of immigrants into a host country's society, economy, and polity has become a major issue for policymakers. For social cohesion and inclusive growth and the ability of migrants to become self-reliant, productive citizens the integration of immigrants and of their children is vibrant. This chapter identifies various dimensions and indicators involved in integration of immigrants into a host society. There are always concerns about successful integration; however, this is not determined solely by the actions immigrants take and the resources they possess. The reception—supportive, neutral, or negative—they receive from the host community plays a critical role. In this direction, this chapter also highlights various challenges and gaps that are involved in immigrant integration.