A republic ( from Latin: res publica) is a sovereign state or country which is organized with a form of government in which power resides in elected individuals representing the citizen body and government leaders exercise power according to the rule of law. As far as banking and competitive exams are concerned, Different Countries Republic Days are often asked in the GK Section.

The day on which the foundation of a republic is commemorated, in particular (in India) 26 January is called Republic Day.
In American English, the definition of a republic can also refer specifically to a government in which elected individuals represent the citizen body. And a republic that exercises power according to the rule of law with a constitution including separation power with a separate elected chief executive (a constitutional republic) or representative democracy(a democratic Republic).
As of 2017, 159 of the world's 206 sovereign state use the word "republic" as part of their official names – not all of these are republics in the sense of having elected governments, nor is the word "republic" used in the names of all nations with elected governments. While heads-of-state often tend to claim that they rule only by the "consent of the governed", elections in some countries have been found to be held more for the purpose of "show" than for the actual purpose of in reality providing citizens with any genuine ability to choose their own leaders.
Republic Day is the name of a holiday in Several Countries to commemorate the Day when they became Republics.