This is a list of heads of state, heads of governments, and other rulers in the year 2018.  Algeria President –Abdelaziz Bouteflika, President of Algeria...

Lists of state leaders by century List of state leaders in the 12th century List of state leaders in the 13th century List of state leaders in the 15th...

Lists of state leaders by century List of state leaders in the 7th century List of state leaders in the 8th century List of state leaders in the 10th century...

Lists of state leaders by century List of state leaders in the 13th century List of state leaders in the 14th century List of state leaders in the 16th...

Lists of state leaders by century List of state leaders in the 16th century List of state leaders in the 17th century List of state leaders in the 19th...

is a list of state leaders in the 20th century (1901–1950) AD, such as the heads of state, heads of government, and the general secretaries of single-party...

This is a list of state leaders in the 19th century (1801–1850) AD, except for the leaders within British south Asia and its predecessor states, and those...

This is a list of state leaders in the 8th century (701–800) AD. Makuria (complete list) – Merkourios, King (696–710) Simeon, King (early 8th century)...

is a list of current heads of state and heads of government. In some cases, mainly in presidential systems, one leader is head of state and head of government...

a list of current state leaders ordered by their continuous tenure in a position of national leadership. For countries in which the head of state and...