These are some of the most expensive ZIP codes in the country

If you thought 90210 was the swankiest place in California, think again: The most expensive ZIP code in the state is actually Atherton's 94027. Situated next to Palo Alto and Menlo Park, the wealthy Silicon Valley town is a short drive from Facebook's headquarters and home to numerous tech executives, including Sheryl Sandberg and Meg Whitman.

Personal finance site GOBankingRates recently named these the most expensive ZIP codes in almost every U.S. state (with the exception of South Dakota, where there wasn't sufficient data) using numbers provided by Zillow. The ranking compares median home prices from January 2017 for hundreds of ZIP codes across the country, according to Zillow's Home Value Index.

Read on to see the most expensive ZIP code in almost every U.S. state, bearing in mind that, in some cases, complete statewide data wasn't available.

ZIP code: 35223
City: Mountain Brook
Zillow median home value: $543,700

ZIP code: 99516
City: Anchorage
Zillow median home value: $446,000

ZIP code: 85253
City: Paradise Valley
Zillow median home value: $1,341,800

ZIP code: 72223
City: Little Rock
Zillow median home value: $318,300

ZIP code: 94027
City: Atherton
Zillow median home value: $6,177,000

ZIP code: 81435
City: Mountain Village
Zillow median home value: $905,600

ZIP code: 06830
City: Greenwich
Zillow median home value: $1,730,200

ZIP code: 19807
City: Wilmington
Zillow median home value: $729,700

ZIP code: 33921
City: Boca Grande
Zillow median home value: $1,313,600

ZIP code: 30327
City: Atlanta
Zillow median home value: $975,300

ZIP code: 96821
City: Honolulu
Zillow median home value: $1,295,400

ZIP code: 83455
City: Victor
Zillow median home value: $349,500

ZIP code: 60043
City: Kenilworth
Zillow median home value: $1,350,000

ZIP code: 46077
City: Zionsville
Zillow median home value: $324,500

ZIP code: 52411
City: Cedar Rapids
Zillow median home value: $274,900

ZIP code: 66224
City: Leawood
Zillow median home value: $457,200

ZIP code: 40513
City: Lexington
Zillow median home value: $359,200

ZIP code: 70115
City: New Orleans
Zillow median home value: $488,200

ZIP code: 04270
City: Town of Oxford
Zillow median home value: $127,400

ZIP code: 20816
City: Bethesda
Zillow median home value: $905,700

ZIP code: 02493
City: Weston
Zillow median home value: $ 1,568,300

ZIP code: 48302
City: Bloomfield Hills
Zillow median home value: $468,600

ZIP code: 55424
City: Edina
Zillow median home value: $705,400

ZIP code: 39110
City: Madison
Zillow median home value: $239,800

ZIP code: 63124
City: Ladue
Zillow median home value: $844,500

ZIP code: 59106
City: Billings
Zillow median home value: $321,100

ZIP code: 68520
City: Lincoln
Zillow median home value: $371,500

ZIP code: 89411
City: Geona
Zillow median home value: $732,600

ZIP code: 03870
City: Rye
Zillow median home value: $717,500

ZIP code: 07620
City: Alpine
Zillow median home value: $2,655,200

ZIP code: 87506
City: Santa Fe
Zillow median home value: $638,500

ZIP code: 11976
City: Water Mill
Zillow median home value: $3,798,500

ZIP code: 28480
City: Wrightsville Beach
Zillow median home value: $885,900

ZIP code: 58503
City: Bismarck
Zillow median home value: $319,400

ZIP code: 45174
City: Terrace Park
Zillow median home value: $500,500

ZIP code: 73078
City: Piedmont
Zillow median home value: $196,900

ZIP code: 97210
City: Portland
Zillow median home value: $795,800

ZIP code: 19035
City: Lower Merion Township
Zillow median home value: $931,800

ZIP code: 02835
City: Jamestown
Zillow median home value: $604,600

ZIP code: 29915
City: Bluffton/Daufuskie Island
Zillow median home value: $488,900

ZIP code: 37215
City: Nashville
Zillow median home value: $658,900

ZIP code: 75205
City: University Park
Zillow median home value: $1,343,800

ZIP code: 84060
City: Park City
Zillow median home value: $940,700

ZIP code: 05445
City: Charlotte
Zillow median home value: $496,900

ZIP code: 22066
City: Great Falls
Zillow median home value: $ 1,104,000

ZIP code: 98039
City: Medina
Zillow median home value: $2,311,100

ZIP code: 26541
City: Maidsville
Zillow median home value: $203,700

ZIP code: 53726
City: Madison
Zillow median home value: $449,700

ZIP code: 82009
City: Cheyenne
Zillow median home value: $254,000

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Clarification: The headline and story were revised to reflect that the Zillow statistics were incomplete.