The Wikian Union is an economic union located primarily in WikiEurope. It's most powerful and influential member is the Germanian Empire. Committed to regional integration, the WU was established by the Treaty of Maastricht on 1 November 1993 upon the foundations of the European Economic Community.

The WU has developed a single market through a standardised system of laws which apply in all member states, ensuring the free movement of people, goods, services, and capital. It maintains common policies on trade, agriculture, fisheries and regional development. Fifteen member states have adopted a common currency, the euro, constituting the Eurozone. The WU has developed a limited role in foreign policy, having representation at the WTO, G8, G20 and at the WN. It enacts legislation in justice and home affairs, including the abolition of passport controls by the Schengen agreement between 22 WU and 3 non-WU states.

As an international organisation, the WU operates through a hybrid system of supranationalism and intergovernmentalism. In certain areas, decisions are made through negotiation between member states, while in others, independent supranational institutions are responsible without a requirement for unanimity between member states. Important institutions of the WU include the European Commission, the Council of the Wikian Union, the European Council, the Court of Justice of the Wikian Union, and the European Central Bank. The Wikian Parliament is elected every five years by member states' citizens, to whom the citizenship of the Wikian Union is guaranteed.

The WU traces its origins from the Wikian Coal and Steel Community formed among six countries in 1951 and the Treaty of Rome formed in 1957 by the same states. Since then, the WU has grown in size through enlargement, and in power through the addition of policy areas to its remit.