List of heirs apparent
List of heirs apparent
|Commonwealth realms||Image||Heir apparent||Relationship|
| Antigua and Barbuda
Papua New Guinea
Saint Kitts and Nevis
Saint Vincent and the Grenadines
|Charles, Prince of Wales 
born 14 November 1948
|Eldest son of Queen Elizabeth II|
In federal monarchies
|State||Image||Style||Current heir apparent||Relationship with the current monarch|
|Johor Darul Takzim||Tunku Mahkota||Tunku Ismail Idris ibni Sultan Ibrahim Ismail||Eldest son|
|Kedah Darul Aman||Raja Muda||Vacant|
|Kelantan Darul Naim||Tengku Mahkota||Tengku Muhammad Faiz Petra||Younger brother|
|Pahang Darul Makmur||Tengku Mahkota||Tengku Abdullah ibni Sultan Ahmad Shah||Eldest son|
|Perak Darul Ridzuan||Raja Muda||Raja Ja'afar ibni Raja Muda Musa||Cousin|
|Perlis Indera Kayangan||Raja Muda||Tuanku Syed Faizuddin Putra ibni Syed Sirajuddin Jamalullail||Eldest son|
|Selangor Darul Ehsan||Raja Muda||Tengku Amir Shah ibni Sultan Sharafuddin Idris Shah||Eldest son|
|Terengganu Darul Iman||Yang di-Pertuan Muda||Tengku Muhammad Ismail ibni Sultan Mizan Zainal Abidin||Eldest son|
The State of Negeri Sembilan Darul Khusus does not have an heir apparent, as the ruler of Negeri Sembilan, known as the Yang di Pertuan Besar of Negeri Sembilan is elected by a council of the four Undangs of Sungai Ujong, Jelebu, Johol, and Rembau.
The rules of succession in Perak Darul Ridzuan are more complicated than other Malay states. After a sovereign is appointed and installed he will appoint the Raja Muda (heir apparent) and Raja Di Hilir (heir presumptive) on advice of the Dewan Negara (Royal Council). The reigning Sultan appoints princes of the blood (Waris negri) to certain high princely titles for life. They are arranged in a strict order of precedence indicating the order of succession to the throne. The relative precedence of these titles has altered from time to time, and additional titles have been included and removed. However, the current order, as confirmed on 25 February 1953, stands as follows:
1) Duli Yang Teramat Mulia (Tuanku) Raja Muda, Wakil us-Sultan, Wazir ul-Azam Negara Perak Dar ur-Ridzwan.
2) Duli Yang Amat Mulia Raja di-Hilir.
3) Yang Amat Mulia Raja Kechil Besar.
4) Yang Mulia Raja Kechil Sulong.
5) Yang Mulia Raja Kechil Tengah.
6) Yang Mulia Raja Kechil Bongsu.
On the death or promotion of an existing titleholder, the holder of the next most senior title, succeeds. On the death of a reigning Sultan, the prince holding the title of Raja Muda, the senior prince in the hierarchy succeeds him. The prince enjoying the title of Raja di-Hilir, becomes the new Raja Muda. The Raja Kechil Besar, becomes Raja di-Hilir, and so on. The new Sultan may then appoint his own nominee to the junior-most title made vacant by these successions.
United Arab Emirates
|Emirate||Image||Heir apparent||Relationship with the current monarch|
|Abu Dhabi||Sheikh Mohammed bin Zayed bin Sultan Al Nahyan||Half brother|
|Ajman||Sheikh Ammar bin Humaid bin Rashid Al Nuaimi|
|Dubai||Sheikh Hamdan bin Mohammed bin Rashid Al Maktoum||Second son|
|Fujairah||Sheikh Mohammed bin Hamad bin Mohammed Al Sharqi||Eldest son|
|Ras al-Khaimah||Sheikh Muhammed bin Saud bin Saqr Al Qasimi|
|Sharjah||Sheikh Sultan bin Mohammed bin Sultan Al Qasimi|
|Umm al-Quwain||Sheikh Rashid bin Saud bin Rashid Al Mualla|
Current sovereign monarchs without an heir apparent
|Country||Current monarch||Reason for no heir apparent||Current heir presumptive||Relationship|
|Andorra||Co-prince Joan Enric Vives Sicília||Successor must be appointed by the Pope.||None|
|Co-prince François Hollande||Successor must be elected by the French citizens.|
|Cambodia||King Norodom Sihamoni||New monarch will be elected.||None|
|Malaysia||King Muhammad V of Kelantan||New monarch will be elected.||None|
|Oman||Sultan Qaboos bin Said al Said||Sultan has no children. Heir was appointed.||successor's name a state secret.|
|Qatar||Emir Tamim bin Hamad Al Thani||Successor must be elected.||Deputy Emir Abdullah bin Hamad Al Thani||Brother|
|Spain||King Felipe VI||The King has no sons.||Leonor, Princess of Asturias||Elder daughter|
|Swaziland||King Mswati III||Successor must be elected.||None|
|Thailand||King Rama X||The King has several children, but no claim for succession.||Dipangkorn Rasmijoti||Legitimate son|
|Vatican City||Pope Francis||Successor must be elected.||None|
- Alois is the current regent of Liechtenstein.
- Prince Charles was also heir to the following thrones before they became republics: Ceylon, Fiji, The Gambia, Ghana, Guyana, Kenya, Malawi, Kenya, Malta, Mauritius, Nigeria, Pakistan, Sierra Leone, Union of South Africa, Tanganyika, Trinidad and Tobago and Uganda
- Netty Royal
- Royal Ark
- Sharjah Tourism