Number of millionaires in the world

The "World Wealth Report" is a report on individuals with a net worth of at least $1 million in all assets except their "primary residence". The report is compiled annually by Capgemini for Merrill Lynch.
World Wealth Report 2007 - "The 11th annual World Wealth Report from Merrill Lynch/Capgemini finds the World’s High Net Worth (HNW) population growing to 9.5 million with their assets rising to $37.2 trillion."[6]
Some growth in international wealth and the number of high net worth individuals can be attributed to the weakness of the US dollar, as stated in the report.
HNWIs (more than $1 million, in 2006)
Region
Number
Percentage of regional population
Global
9,500,000
0.15%
North America
3,200,000
0.62%
Europe
2,900,000
0.41%
Asia-Pacific
2,600,000
0.06%
Latin America
400,000
0.07%
Middle East
300,000
N/A
Africa
100,000
0.01%
Ultra-HNWIs (Ultra-HNWIs Account for 1.0% of All HNWIs) (more than $30 million, in 2006)
UHNWIs (more than $30 million, in 2006)
Region
Number
Percentage of regional population
Global
95,000
0.001%
North America
38,400
0.007%
Europe
23,200
0.003%
Asia-Pacific
18,200
0.0004%
Latin America
9,600
0.002%
Middle East
3,300
N/A
Africa
2,000
0.00002%
Scotland has more female millionaires than male.[citation needed]

United States
Main article: American upper class
There is a wide disparity in the estimates of the number of millionaires residing currently in the United States. According to TNS Financial Services, as reported by CNN money, 8.9 million households in the US alone had a net worth of at least $1 million excluding primary residences in 2005.[7] According to TNS, the number of millionnaire US households is now 9.3 million, with an increase of half a million since 2005.[8] Millionaire households thus constituted roughly seven percent of all American households. The study also found that half of all millionaire households in the US were headed by retirees. Another finding was a record "33 percent increase over the 6.2 million households that met that criteria in 2003," fueled largely by the country's real estate boom.[9]
A report by Capgemini[10] for Merrill Lynch on the other hand stated that there are approximately 2,900,000 households in North America whose net worth exceeds 1 million US dollars (which include "private equity holdings stated at book value, ...publicly quoted equities, bonds, funds and cash deposits.. offshore investments are theoretically accounted for, but only insofar as countries are able to make accurate estimates.." as well as real estate not used for primary residences) (p. 30)).
According to ABC News, Los Angeles County, California has the highest number of millionaires at 262,800 households. Followed closely by Orange County, California, Cook County, Illinois and Maricopa County, Arizona.[11]