Fan Casting The Magocracy in Sort by Tropes

A society ruled by wizards. Wizards, plural, that is — a king or queen who just happens to be a spellcaster (such as the Benevolent Mage Ruler) doesn't count, nor does the traditional tower-dwelling Sorcerous Overlord. This typically takes the form of either a self ruling society entirely made up of mages or of an otherwise relatively normal society (for a given value of "normal") that is governed by a magic-using oligarchy. Sometimes there is a Muggle figurehead on the throne, but clearly power lies with the spellcasters.