The 6,298-square-foot home includes a large living room on the upper level, with a wall of antique shelving featuring intricate hand-carving from India. The rest of the condo includes features such as travertine floors, marble walls and a saltwater fish tank in the family room. (David Hernandez with Rews Miami for ONE Sotheby's International Realty)

While neighborhoods in Silicon Valley and New York City are known for their high-priced real estate and wealthy residents, a Bloomberg analysis of IRS data found that tiny — and tony — Fisher Island off the coast of Miami is the richest Zip code in the country with an average household income of $2.5 million.

The members-only island, accessible only by yacht or private ferry, has reportedly attracted celebrity owners such as Oprah Winfrey, Boris Becker and Karolina Kurkova. Property owners pay $250,000 in an equity membership fee to gain access to amenities such as golf, tennis, dining options, a private beach, a marina, a fitness center and a spa.

Among the few properties available on the island is a $14 million two-level home created from two combined condo units with a total of five bedrooms and seven bathrooms. The ground floor terrace provides private beach access, while the upper level terrace also faces the ocean.

The 6,298-square-foot home includes a large living room on the upper level, with a wall of antique shelving featuring intricate hand-carving from India. The rest of the condo includes features such as travertine floors, marble walls and a saltwater fish tank in the family room. The master bedroom is on the ground floor near the family room and a den, along with two more bedrooms. The kitchen, staff rooms and guest bedrooms are upstairs.

For more information, contact ONE Sotheby’s International Realty agent Elena Bluntzer at 305-666-0562 or click here.