In the second floor of the Ministry you will find the offices of Aurors,
Misuse of Muggle Artifacts,
the Detection and Confiscation of Counterfeit Defensive Spells and Protective Objects,
Improper Use of Magic (Head is Micah Gene Everett), and the office of the
Wizengamot and Wizengamot Administration Servicesl

In the third floor you will find these departments and more: Accidental Magic Reversal Squad, Obliviator Headquarters, Muggle-Worthy Excuse Committee, Invisibility Task Force, and the Muggle Liaison Office

In the fourth floor of the Ministry you will find theses divisions: Beast Division, Being Division, Spirit Division, Goblin Liaison Office, Centaur Liaison Office, Pest Advisory Board, and the Office of Misinformation

In the International Magical Cooperation's Department you will find theses divisions. International Magical Trading Standards Body, International Magical Office of Law, International Confederation of Wizards (holds Norway's members of it). It is important for this Department to be concerned in Foreign Affairs on a Political and Social Standing.

Here you will find these divisions: Floo Network Authority, Broom Regulatory Control, Portkey Office and the Apparation Test Center.

Some of it's divisions include:
Norwegian and Swedish Quidditch League Headquarters,
Official Gobstones Club, and the Ludicrous Patents Office.

Some of the rooms of the Department of Mysteries are: the Brain Room, the Space Chamber, the Death Chamber, the Time Room, the Hall of Prophecy and the Love Chamber. There are many rooms that are unknown of to most wizarding folk as well.

This Department is the lead in the advancement of Muggle Rights. It's current Head is: Dionysus Pierce Svenningsen

The Wizengamot, the Wizard High Court, and the Council of Magical Law to put witches and wizards on full-scale criminal trials.

Under special permission or request of the Minister you may be lucky enough to find yourself in this office.