The euro sign, in Unicode U+20AC € euro sign (HTML: € €), is the currency sign used for the euro, the official currency of the Eurozone in the European Union (EU). The design was presented to the public by the European Commission on 12 December 1996. The international three-letter code (according to ISO standard ISO 4217) for the euro is EUR.

The euro currency sign was designed to be similar in structure to the old sign for the European currency unit, ₠. After a public survey had narrowed the original ten proposals down to two, it was up to the European Commission to choose the final design. The eventual winner was a design created by a team of four experts whose identities have not been revealed. It is assumed that the Belgian graphic designer Alain Billiet was the winner and thus the designer of the euro sign.

The official story of the design history of the euro sign is disputed by Arthur Eisenmenger, a former chief graphic designer for the European Economic Community, who claims he had the idea prior to the European Commission.

The euro (Greek: Ευρώ, Evró) (sign: €; code: EUR) is the official currency of the eurozone, which consists of 17 of the 27 member states of the European Union. It is also the currency used by the Institutions of the European Union. The eurozone consists of Austria, Belgium, Cyprus, Estonia, Finland, France, Germany, Greece, Ireland, Italy, Luxembourg, Malta, the Netherlands, Portugal, Slovakia, Slovenia, and Spain. The currency is also used in a further five European countries and consequently used daily by some 332 million Europeans. Additionally, over 175 million people worldwide - including 150 million people in Africa - use currencies which are pegged to the euro.

The euro is the second largest reserve currency as well as the second most traded currency in the world after the United States dollar. As of February 2012^[update], with more than €890 billion in circulation, the euro has the highest combined value of banknotes and coins in circulation in the world, having surpassed the US dollar. Based on International Monetary Fund estimates of 2008 GDP and purchasing power parity among the various currencies, the eurozone is the second largest economy in the world.

A sign is a representation of an object that implies a connection between itself and its object. A natural sign bears a causal relation to its object—for instance, thunder is a sign of storm. A conventional sign signifies by agreement, as a full stop signifies the end of a sentence. (This is in contrast to a symbol which stands for another thing, as a flag may be a symbol of a nation).

The way a sign signifies is called semiosis which is a topic of semiotics and philosophy of language.

How a sign is perceived depends upon what is intended or expressed in the semiotic relationship of:

Thus, for example, people may speak of the significance of events, the signification of characters, the meaning of sentences, or the import of a communication. Different ways of relating signs to their objects are called modes of signification.

Uses of conventional signs are varied. Usually the goal is to elicit a response or simply inform. That can be achieved by marking something, displaying a message (i.e. a notice), drawing attention or presenting evidence of an underlying cause (for instance, medical symptoms signify a disease), performing a bodily gesture, etc.