| State | County/County-equivalent | Per-capita income | Population | % Correct |
|---|---|---|---|---|
| Virginia | City of {Alexandria} | $54,608 | 143,684 | 83%
|
| New York | County of {New York} | $62,498 | 1,605,272 | 83%
|
| Virginia | {Arlington} County | $62,018 | 214,861 | 79%
|
| California | City and County of {San Francisco} | $48,486 | 817,501 | 75%
|
| Virginia | {Fairfax} County | $50,532 | 1,101,071 | 71%
|
| New York | {Westchester} County | $47,984 | 956,283 | 67%
|
| California | {Marin} County | $56,791 | 254,643 | 63%
|
| Maryland | {Montgomery} County | $49,038 | 989,474 | 63%
|
| Virginia | City of {Falls Church} | $59,088 | 12,731 | 54%
|
| Connecticut | {Fairfield} County | $48,721 | 926,233 | 50%
|
| Maryland | {Howard} County | $48,172 | 293,821 | 50%
|
| Virginia | {Loudoun} County | $46,565 | 326,477 | 50%
|
| New Mexico | {Los Alamos} County | $51,044 | 17,979 | 46%
|
| New Jersey | {Somerset} County | $47,803 | 326,207 | 46%
|
| New Jersey | {Hunterdon} County | $50,349 | 127,047 | 42%
|
| New Jersey | {Morris} County | $48,814 | 495,261 | 38%
|
| Colorado | {Pitkin} County | $51,814 | 17,173 | 38%
|
| Massachusetts | Town and County of {Nantucket} | $47,331 | 10,224 | 38%
|
| Alaska | {North Slope} Borough | $46,457 | 9,484 | 33%
|
| Texas | {Borden} County | $50,042 | 649 | 29%
|