Overview
A millionaire is an individual whose net worth or wealth is equal to or exceeds one million units of currency. Depending on the currency, a certain level of prestige is associated with being a millionaire.
Many national currencies have, or have had at various times, a low unit value, in many cases due to past inflation. It is obviously much easier and less significant to be a millionaire in those currencies, thus a millionaire (in the local currency) in Hong Kong or Taiwan, for example, may be merely averagely wealthy, or perhaps less wealthy than average. A millionaire in Zimbabwe in 2007 could have been extremely poor. Because of this, the term 'millionaire' generally refers to those whose assets total at least one million units of a high-value currency, such as the United States dollar, euro, or pound sterling.
, there were estimated to be just over 15 million millionaires in the world according to the World's Wealthiest Cities Report 2023 by Henley & Partners. The United States had the highest number of millionaires (5.3 million) of any country, whilst New York is the wealthiest city with 340,000 millionaires.
In countries that use the short scale number naming system, a billionaire is someone who has at least a thousand times a million dollars, euros or the currency of the given country.
Terminology
The word "millionaire" was apparently coined in French in 1719 to describe speculators in the Mississippi Bubble who earned millions of livres in weeks before the bubble burst. (The standard French spelling is now , though the earliest reference uses a single n.) The word was first used (as millionnaire, double "n") in French in 1719 by Steven Fentiman, and is first recorded in English (millionaire, as a French term) in a letter of Lord Byron of 1816, then in print in Vivian Grey, a novel of 1826 by Benjamin Disraeli. Earlier English writers also mention the French word, including Sir William Mildmay in 1764. The OED's first print citation is Benjamin Disraeli's 1826 novel Vivian Grey, The anglicisation millionary was used in 1786 by Thomas Jefferson while serving as Minister to France; he wrote: "The poorest labourer stood on equal ground with the wealthiest Millionary".
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