Monosystems of common law
| Common Law Monosystems |
|---|
| Antigua and Barbuda |
| Australia |
| Bahamas |
| Barbados |
| Belize |
| Canada (except Québec) |
| Dominica |
| United States of America |
| Grenada |
| Jamaica |
| Kiribati |
| Marshall Islands |
| Nauru |
| Palau |
| United Kingdom |
| Trinidad and Tobago |
| Tuvalu |
| 1 to 20 (18) |