Construction of infrastructure, a pre-requisite for sustained socioeconomic growth, often requires acquisition of land and, therefore, physical relocation and economic displacement of people. If such impacts, collectively characterized as involuntary resettlement, are not identified and adequately mitigated, some already vulnerable populations are likely to be further impoverished, thereby undermining development objectives. Involuntary Resettlement Sourcebook clarifies many policy and technical issues that confront resettlement policymakers and practitioners. It provides guidance on resettlement design, implementation, and monitoring, and it discusses resettlement issues particular to development projects in different sectors. The Sourcebook will be useful to a wide range of stakeholders. Its primary audience is resettlement practitioners, who have a role in the actual design, implementation, and evaluation of resettlement programs. The sourcebook will also be of interest to policymakers and project decision-makers.