This book examines the progress of institutionalisation of evaluation in American countries from various perspectives. It presents prior developments and current states of evaluation in 11 American countries and three transnational organisations, focusing on three dimensions, namely the political, social and professional systems. These detailed country reports, which have been written by selected researchers and authors of the respective countries, lead to a concluding comparison and synthesis. This is the second of four volumes of the compendium The Institutionalisation of Evaluation. The first volume on Europe was published in 2020. It will be followed by two more volumes on Asia Pacific, and Africa. The overall aim is to provide an interdisciplinary audience with cross-country learning to enable them to better understand the institutionalisation of evaluation in different nations, world regions and sectors.