Countries Under |
| Constitutional form: Absolute monarchy |
| Head of state: Executive |
| Basis of executive legitimacy: All authority vested in absolute monarch |
- Brunei
- Oman
- Qatar
- Saudi Arabia
- Swaziland
- Vatican City
Countries Under |
| Constitutional form: Constitutional monarchy |
| Head of state: Executive |
| Basis of executive legitimacy: Monarch personally exercises power in concert with other institutions |
- Bahrain
- Bhutan
- Jordan
- Kuwait
- Liechtenstein
- Monaco
- Morocco
- Tonga
- United Arab Emirates
Countries Under |
| Constitutional form: Constitutional monarchy |
| Head of state: Ceremonial |
| Basis of executive legitimacy: Ministry is subject to parliamentary confidence |
- Andorra
- Antigua and Barbuda
- Australia
- Barbados
- Belgium
- Belize
- Cambodia
- Canada
- Denmark
- Grenada
- Jamaica
- Japan
- Lesotho
- Luxembourg
- Malaysia
- Netherlands
- New Zealand
- Norway
- Papua New Guinea
- Saint Kitts and Nevis
- Saint Lucia
- Saint Vincent and the Grenadines
- Solomon Islands
- Spain
- Sweden
- Thailand
- The Bahamas
- Tuvalu
- United Kingdom