List of national legal systems
Common law is currently in practice in Ireland, most of the United Kingdom (England and Wales and Northern Ireland), Australia, New Zealand, Bangladesh, India (excluding Goa), Pakistan, South Africa, Canada (excluding Quebec), Hong Kong, the United States (on a state level excluding Louisiana), and many other places. In addition to these countries, several others have adapted the common law system into a mixed system. For example, Nigeria operates largely on a common law system, but incorporates religious law.
Commonwealth realm
A Commonwealth realm is a sovereign state in which Queen Elizabeth II is the reigning constitutional monarch and head of state. Each realm is independent from the other realms. As of 2019, there are 16 Commonwealth realms: Antigua and Barbuda, Australia, The Bahamas, Barbados, Belize, Canada, Grenada, Jamaica, New Zealand, Papua New Guinea, Saint Kitts and Nevis, Saint Lucia, Saint Vincent and the Grenadines, Solomon Islands, Tuvalu, and the United Kingdom. All 16 Commonwealth realms are members of the Commonwealth of Nations, an intergovernmental organisation of 53 member states. Elizabeth II is Head of the Commonwealth.