By Jeanne Batalova, Andriy Shymonyak, and Michelle Mittelstadt

  Although international migrants account for just 3.5 percent of the world’s population, their number—almost 272 million people as of 2019—is far from insubstantial. Current and historical research shows that immigration brings significant and long-lasting benefits to countries of destination and origin and to migrants and their families alike. But it also shows that immigration often comes with tremendous challenges for individuals, communities, and institutions. In the United States, a country with a long and complex immigration history, public and political debates that started well back into the 18th century about the size and type of immigration, as well as its socioeconomic impacts, show no sign of abating. And as other countries around the world become migrant-sending, receiving, or transit places (or frequently a combination), migration—whether voluntary or forced—has arguably earned a prime and enduring spot on national and international policy agendas. It also continues to capture significant public and media attention. What is often missing from these conversations is accurate, complete data about who these immigrants are, why they come and leave, and what places they occupy in the socioeconomic hierarchies of their sending and destination countries. In this edition, Immigration Data Matters, which updates an earlier Population Reference Bureau - Migration Policy Institute guide, we have significantly expanded a list of online resources that provide authoritative migration-related data and statistics to help inform understanding of this phenomenon in the United States and globally. As before, our main guiding principle is to offer data from population censuses and surveys, administrative datasets, and new analyses that can help our audience understand the size of immigrant populations and inflows and outflows, enforcement actions, public opinion, historical trends, citizenship acquisition, and many other aspects. Here we list and describe more than 250 data resources, half U.S., half international. These resources are collected or compiled by a wide range of sources, including government statistical agencies, international organizations such as the World Bank and United Nations High Commissioner for Refugees, and reputable research organizations. We use these resources in our own research, and while the list is by no means exhaustive, our goal is to share the most accurate, relevant, publicly available migration-related data, in one user-friendly and accessible guide. We hope this guide helps bring more knowledge to an issue area where the facts are often missing  

Migration Policy Institute and The   Population Reference Bureau , 2020. 49p.