States with the most super-rich residents

In the increasingly top-heavy world of wealth, $30 million is the new $1 million. And the number of people with a net worth of $30 million or higher is growing rapidly in the U.S., especially in California and New York.

According to a new report by Wealth-X and UBS, there are now 69,560 Americans worth $30 million or more, which Wealth-X refers to as "ultra-high net worth individuals." These super rich are highly concentrated on the coasts in New York and California, with the two states adding the largest number of super-rich residents over the past year.

Luxury home prices rise
Luxury home prices rise   

California's population of ultra-high net worth residents grew 7 percent, to a total of 13,445. That's higher than the total for the entire United Kingdom, which has 11,510 ultra-high net worth residents. Almost all of California's super rich were located in San Francisco (5,460) and Los Angeles (5,135).

Read MoreAnother widening gap: The haves vs. the have-mores

California added 865 new super-rich residents and New York added 585, with 91 percent of those New Yorkers living in New York City. In fact, California and New York combined added more new super-rich residents in just one year than the entire ultrawealthy populations of all but a handful of states.

The state with the fastest percentage growth in $30 million-plus residents was North Dakota with 14.3 percent growth, followed by South Dakota with 13.3 percent.

Read MoreRich hoard their cash as wealth hits a record high

Here is the full list of the top 10 states by super-rich populations.

States with the most ultra-high net worth individuals

Rank
State
People worth $30M+
1 California 13,445
2 New York 9,530
3 Texas 6,510
4 Florida 4,710
5 Illinois 2,905
6 Michigan 2,125
7 Pennsylvania 1,620
8 Ohio 1,505
9 Massachusetts 1,410
10 Wisconsin 1,400
Wealth-X and UBS
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