The fact that New York City is home to the most millionaires in the U.S. probably doesn’t come as a shock. More surprising is the fact that the place with the highest concentration of millionaires as a percentage of households is not the Big Apple but rather a tiny town in New Mexico.

Only about 5% of the country, or 6.1 million households, qualify as true millionaires. That is, they boast liquid, investable assets of $1 million or more, excluding real estate, employer-sponsored retirement plans and business partnerships. Research firm Phoenix Marketing International identifies where these millionaires live in an annual survey of wealthy residents in 942 urban areas. We’ve also researched the typical incomes and home values in the top ten cities, in case you’re interested in living next door to one of these millionaires.

10. San Francisco

Metro population: 4.3 million

Concentration of millionaires: 7.6% (U.S. total: 5.2%)

Number of millionaire households: 127,937

Median income for all households: $77,183 (U.S. median: $53,046)

San Francisco is so notoriously expensive, you might be surprised to find any nonmillionaires living there. After all, living costs 61.6% above the national average pretty much require residents of the metropolitan area — including Fremont and Oakland across the Bay — to hold a sizable amount of wealth. In fact, 16.1% of the local millionaire households are worth $5 million or more.

9. Trenton, N.J.

Metro population: 366,442

Concentration of millionaires: 7.6%

Number of millionaire households: 10,503

Median income for all households: $73,759

Median home value: $293,100

Trenton might deserve its rough-around-the-edges reputation, but its status as the state capital as well as its proximity to the Big Apple mean the surrounding metro area has its fair share of moneyed residents. In fact, New Jersey is the state with the second-highest concentration of millionaire households, behind Maryland and just ahead of Connecticut.

8. Honolulu

Metro population: 955,215

Concentration of millionaires: 8.0%

Number of millionaire households: 25,496

Median income for all households: $72,292

Median home value: $557,800

Beautiful beaches, lush interior landscapes and fine weather year-round — it's no wonder millions of tourists visit this tropical paradise annually. And with a cost of living that's 69.1% higher than the national average, it's also no wonder more of them don't stay. The Hawaiian capital is the most expensive U.S. city to live in after New York. But that just leaves more sand and surf for

7.Oxnard, Calif.

Metro population: 822,794

Concentration of millionaires: 8.0%

Number of millionaire households: 21,892

Median income for all households: $76,483

Better known to locals as Ventura County, this Pacific Coast metro area extends into the foothills 70 miles west of Los Angeles. Its beach houses may be famous as a celebrity refuge, having entertained the likes of Clark Gable, Carole Lombard and Sonny and Cher.

6. San Jose, Calif.

Metro population: 1.8 million

Concentration of millionaires: 8.1%

Number of millionaire households: 52,358

Median income for all households: $89,940

In Silicon Valley, there is a mountain of wealth. You can chalk up those riches to the fact that some of the world's biggest tech companies, including Apple, Intel and Google, call this metro area home. Big paychecks come along with those big industry names, explaining why the median household

5. Easton, Md.

Metro population: 37,746

Concentration of millionaires: 8.3%

Number of millionaire households: 1,353

Median income for all households: $62,942

Median home value: $343,800

Maryland regularly ranks among the top states rich in millionaires due to its proximity to power. Less than two hours’ drive from the nation’s capital, Easton provides an escape from the bustle inside the beltway. But the seat of Talbot County is more than just a quaint coastal retreat for vacationing D.C. lobbyists. The largest employer is the University of Maryland Shore Medical Center at Easton and, in addition to health care, other major industries in the area, such as business and financial services, keep the town buzzing as a regional hub. For those who can afford the luxury, there’s even an airport that provides quicker commutes (as well as nice aerial views of the Chesapeake Bay).

4.Stamford, Conn.

Metro population: 918,892

Concentration of millionaires: 8.5%

Number of millionaire households: 29,065

Median income for all households: $82,614

Median home value: $447,500

The southwest coast of Connecticut, stretching from Bridgeport to the border with New York, provides a perfect (and preppy) suburban base for high-powered commuters, many of whom work and play in nearby Manhattan. Nearly 35,000 residents, or 8.2% of the local labor force, are employed in management positions, earning a median wage of about $62 per hour. And 16.8% of households report an annual income of $200,000 or more; only 4.6% of the nation's households pull in that much each year. Those high paychecks can help cover the costs of living in one of the most expensive places in the U.S. Typical homes in affluent small towns such as Old Greenwich and Darien go for $1 million.

3. Lexington Park, Md.

Metro population: 105,528

Concentration of millionaires: 8.8%

Number of millionaire households: 3,458

Median income for all households: $85,032

Median home value: $312,100

D.C.'s influence flows to another Maryland Chesapeake town 100 miles south of Washington in picturesque St. Mary’s County. This is home to the Naval Air Station Patuxent River and a center for defense and aerospace research. Think all manner of advanced military aircraft, from presidential helicopters to unmanned fighters. Among the high-tech defense contractors providing lucrative jobs to 10,000 area workers are DynCorp, BAE Systems, Wyle, Lockheed Martin and Boeing. Many of those positions are in the lucrative science, technology, engineering and math fields, helping to push up average annual incomes into the six figures.

2. Washington, D.C.

Metro population: 5.6 million

Concentration of millionaires: 8.8%

Number of millionaire households: 191,603

Median income for all households: $89,826

Median home value: $384,000

D.C.'s wealth may spill onto the shores of Maryland, but plenty of millionaires opt to sit directly atop the nation's seat of power. The Washington metro area is home to the greatest number of millionaire households on this list and ranks among the top five areas in the nation for the most millionaires. In D.C. proper, you can find many moneyed residents, including high-profile politicians, lobbyists and government contractors, living in the townhouses of Georgetown and Capitol Hill. In the surrounding suburbs of Arlington, Va., and Bethesda, Md., residents enjoy median household incomes of $102,459 and $141,817, respectively. They also endure high living costs, with median home values of $577,300 and $805,900.

1. Los Alamos, N.M.

Total metro population: 18,008

Concentration of millionaires: 12.4%

Number of millionaire households: 987

Median income for all households: $106,426

Median home value: $285,800

This tiny New Mexico town has the smallest population, as well as the highest concentration of millionaires, on this list.

Chalk up the density of affluence to the National Laboratory, a research facility focused on national security and the area's largest employer. Since the lab was established in 1943 as site Y of the Manhattan Project, it has drawn some of the world's top scientific minds with state-of-the-art facilities, currently including more than 1,200 buildings on a 36-square-mile campus, and generous paychecks. In fact, the area's six-figure median household income is the highest on this list. And with the lowest median home value of all these millionaire-laden cities, wealthy residents can put more money toward savings than toward mortgages.