Millionaire Population Grows by 200,000 Americas millionaire population is still growing though not by much. The number of millionaires in America grew by 200,000 in 2011, according to a new report from Chicago-based Spectrem Group. That sounds like a lot especially with so many Americans still losing jobs and homes. But it represents a growth rate of only 2% much slower than the growth in 2009 and 2010. According to Spectrem, there are now 8.6 million households in the U.S. with a total net worth (minus principal residence) of $1 million or more. The number of households worth $5 million or more and $25 million or more also remained fairly flat, with growth of less than 2%. There are now 1,078,000 households worth $5 million or more and about 107,000 people worth $25 million or more. And who are today's millionaires? The report also broke down todays millionaires by occupation and former occupation if retired. Managers make up the largest group, with 17%, followed by educators (12%), corporate executives (7%), entrepreneur/business owners (6%) and attorneys and accounts.