Lists of state leaders by age

This article contains various lists of state leaders organized by age, defined as heads of state and/or heads of government.
10 oldest serving state leaders.
People currently serving as head of state and/or head of government, a party leader of a one-party state, or a representative of a head of state.
Longest-lived state leaders.
The following lists are the top ten all-time state leaders and the top ten living.
10 youngest state leaders (since 1942).
Leaders still serving are highlighted in italicized bold.