thumb|250x250px|[[Hassanal Bolkiah, the longest-reigning existing monarch]]
This is a list of reigning monarchs sorted by length of service.
This list includes monarchs who do not reign over entire nations, such as Muhammad V of Kelantan, but does not include pretenders, such as Simeon II of Bulgaria; monarchs without physical territories such as the Prince and Grand Master of the Sovereign Military Order of Malta; constituent monarchs such as traditional African rulers; or monarchs whose position is unofficial, such as Tenzin Gyatso, 14th Dalai Lama.
Hassanal Bolkiah is the longest-reigning existing monarch, having been Sultan of Brunei since 5 October 1967. He became the longest-reigning monarch upon the death of Elizabeth II of the United Kingdom on 8 September 2022. Ntfombi, Queen Mother of Eswatini is the only female monarch in the world.
List
{| class="wikitable sortable plainrowheaders"
|-
! scope="col" | Rank
! scope="col" | Monarch
! scope="col" | State
! scope="col" | Country
! scope="col" | Born
! scope="col" | Current age
! scope="col" | Acceded
! scope="col" | Years reigned
|-
! colspan=8 |Reigns as of
|-
| 1
| scope="row" | Hassanal Bolkiah
| colspan=2 |Brunei
|
|
|
|
|-
| 2
| scope="row" | Sultan bin Mohamed Al-Qassimi III
| Sharjah
| United Arab Emirates
|
|
|
|
|-
| 3
| scope="row" | Carl XVI Gustaf
| colspan=2 |Sweden
|
|
|
|
|-
| 4
| scope="row" | Hamad bin Mohammed Al Sharqi
| Fujairah
| rowspan=2 |United Arab Emirates
|
|
|
|
|-
| 5
| scope="row" | Humaid bin Rashid Al Nuaimi III
| Ajman
|
|
|
|
|-
| 6
| scope="row" | Ntfombi
| colspan=2; rowspan=2 |Eswatini
|
|
|
|
|-
| 7
| scope="row" | Mswati III
|
|
|
|
|-
| 8
| scope="row" | Hamengkubuwono X
| Yogyakarta
| Indonesia
|
|
|
|
|-
| 9
| scope="row" | Hans-Adam II
| colspan=2 |Liechtenstein
|
|
|
|
|-
| 10
| scope="row" | Harald V
| colspan=2 |Norway
|
|
|
|
|-
| 11
| scope="row" | Letsie III
| colspan=2 |Lesotho
|
|
|
|
|-
| 12
| scope="row" | Mizan Zainal Abidin
| Terengganu
| Malaysia
|
|
|
|
|-
| 13
| scope="row" | Abdullah II
| colspan=2 |Jordan
|
|
|
|
|-
| 14
| scope="row" | Hamad bin Isa Al Khalifa
| colspan=2 |Bahrain
|
|
|
|
|-
| 15
| scope="row" | Mohammed VI
| colspan=2 |Morocco
|
|
|
|
|-
| 16
| scope="row" | Syed Sirajuddin
| Perlis
| rowspan=2 | Malaysia
|
|
|
|
|-
| 17
| scope="row" | Sharafuddin Idris Shah
| Selangor
|
|
|
|
|-
| 18
| scope="row" | Norodom Sihamoni
| colspan=2 |Cambodia
|
|
|
|
|-
| 19
| scope="row" | Albert II
| colspan=2 |Monaco
|
|
|
|
|-
| 20
| scope="row" | Mohammed bin Rashid Al Maktoum
| Dubai
| United Arab Emirates
|
|
|
|
|-
| 21
| scope="row" | Jigme Khesar Namgyel Wangchuck
| colspan=2 |Bhutan
|
|
|
|
|-
| 22
| scope="row" | Muhriz
| Negeri Sembilan
| Malaysia
|
|
|
|
|-
| 23
| scope="row" | Saud bin Rashid Al Mualla
| Umm al-Quwain
| United Arab Emirates
|
|
|
|
|-
| 24
| scope="row" | Ibrahim Iskandar
| Johor
| Malaysia
|
|
|
|
|-
| 25
| scope="row" | Muhammad V
| Kelantan
| Malaysia
|
|
|
|
|-
| 26
| scope="row" | Saud bin Saqr Al Qasimi
| Ras al-Khaimah
| United Arab Emirates
|
|
|
|
|-
| 27
| scope="row" | Tupou VI
| colspan=2 |Tonga
|
|
|
|
|-
| 28
| scope="row" | Willem-Alexander
| colspan=2 |Netherlands
|
|
|
|
|-
| 29
| scope="row" | Tamim bin Hamad Al Thani
| colspan=2 |Qatar
|
|
|
|
|-
| 30
| scope="row" | Philippe
| colspan=2 |Belgium
|
|
|
|
|-
| 31
| scope="row" | Nazrin Muizzuddin Shah
| Perak
| Malaysia
|
|
|
|
|-
| 32
| scope="row" | Felipe VI
| colspan=2 |Spain
|
|
|
|
|-
| 33
| scope="row" | Salman bin Abdulaziz Al Saud
| colspan=2 |Saudi Arabia
|
|
|
|
|-
| 34
| scope="row" | Paku Alam X
| Pakualaman
| Indonesia
|
|
|
|
|-
| 35
| scope="row" | Vajiralongkorn (Rama X)
| colspan=2 |Thailand
|
|
|
|
|-
| 36
| scope="row" | Emmanuel Macron
| colspan=2 |Andorra
|
|
|
|
|-
| 37
| scope="row" | Mahmud Sallehuddin
| Kedah
| rowspan=2 |Malaysia
|
|
|
|
|-
| 38
| scope="row" | Abdullah Sultan Ahmad Shah
| Pahang
|
|
|
|
|-
| 39
| scope="row" | Naruhito
| colspan=2 |Japan
|
|
|
|
|-
| 40
| scope="row" | Haitham bin Tariq Al Said
| colspan=2 |Oman
|
|
|
|
|-
| 41
| scope="row" | Mohamed bin Zayed Al Nahyan
| Abu Dhabi
| United Arab Emirates
|
|
|
|
|-
| 42
| scope="row" | Josep-Lluís Serrano Pentinat
| colspan=2 |Andorra
|
|
|
|
|-
| rowspan=15 | 43
| rowspan="15" scope="row" | Charles III
| colspan=2 |Antigua and Barbuda
| rowspan=15 |
| rowspan=15 |
| rowspan=15 |
| rowspan=15 |
|-
| colspan=2 |Australia
|-
| colspan=2 |The Bahamas
|-
| colspan=2 |Belize
|-
| colspan=2 |Canada
|-
| colspan=2 |Grenada
|-
| colspan=2 |Jamaica
|-
| colspan=2 |New Zealand
|-
| colspan=2 |Papua New Guinea
|-
| colspan=2 |Saint Kitts and Nevis
|-
| colspan=2 |Saint Lucia
|-
| colspan=2 |Saint Vincent and the Grenadines
|-
| colspan=2 |Solomon Islands
|-
| colspan=2 |Tuvalu
|-
| colspan=2 |United Kingdom
|-
| 44
| scope="row" | Mishal Al-Ahmad Al-Jaber Al-Sabah
| colspan=2 |Kuwait
|
|
|
|
|-
| 45
| scope="row" | Frederik X
| colspan=2 |Denmark
|
|
|
|
|-
| 46
| scope="row" | Leo XIV
| colspan=2 |Vatican City
|
|
|
|
|-
| 47
| scope="row" | Guillaume V
| colspan=2 |Luxembourg
|
|
|
|
|}
See also
- List of current monarchs of sovereign states
- List of current non-sovereign monarchs
- List of current heads of state and government
- List of current state leaders by date of assumption of office
- List of longest-reigning monarchs
- List of shortest-reigning monarchs
- Lists of state leaders by age