Migrations Map: http://migrationsmap.net/#/USA/arrivals
This is an interactive map that demonstrates migration patterns based on statistical data from 2007.
Eurostat is the statistical office of the European Union. It is tasked with providing the European Union with statistics at European level that enable comparisons between countries and regions.
You must select "English" to view this German website in English. Bundesamt für Migration und Flüchtlinge (BAMF) or the Federal Office of Migration and Refugees coordinates information on residency and immigration of the German citizenry.
Migration Policy Institute (MPI) is an independent, nonpartisan, nonprofit think tank in Washington, DC dedicated to analysis of the movement of people worldwide.
International Organization for Migration (IOM) was established in 1951 and is the leading inter-governmental organization in the field of migration.
The Italian National Institute of Statistics (ISTAT.IT) is a public research organization that has been the main producer of official statistics in the service of citizens and policy-makers in Italy since 1926.
United Kingdom: http://www.ons.gov.uk/
The Office for National Statistics (ONS) is the UK’s largest independent producer of official statistics and is the recognised national statistical institute for the UK. Ues the "Browse by theme" section to see the subsection on Migration under Populations.