Approximately 5 percent of Americans are millionaires, as of 2014, according to The Washington Post. Millionaire status is determined by the value of a person's real estate, businesses and financial assets.
Approximately 10 million American households have a net worth of $1 million or more, says CNN. High real estate prices and stock prices created approximately 500,000 new American millionaires in 2014, according to CNBC. Americans count for 40 percent of all millionaires worldwide, notes The Washington Post. Other countries with high percentages of millionaires include Japan, France, Germany, the United Kingdom and China. There are approximately 35 million millionaires worldwide.