| Rnk | County | Income |
| 1 | Somerset County, NJ | 89,289 |
| 2 | Howard County, MD | 88,555 |
| 3 | Prince William County, VA | 82,926 |
| 4 | Morris County, NJ | 82,025 |
| 5 | Fairfax County, VA | 80,753 |
| 6 | Nassau County, NY | 80,647 |
| 7 | Santa Clara County, CA | 76,544 |
| 8 | Montgomery County, MD | 76,439 |
| 9 | Rockland County, NY | 72,276 |
| 10 | Collin County, TX | 71,458 |
| 11 | McHenry County, IL | 70,956 |
| 12 | Suffolk County, NY | 70,281 |
| 13 | Fairfield County, CT | 70,083 |
| 14 | Fort Bend County, TX | 69,848 |
| 15 | Contra Costa County, CA | 69,835 |
| 16 | Lake County, IL | 69,670 |
| 17 | San Mateo County, CA | 69,219 |
|
| 18 | Anne Arundel County, MD | 68,938 |
| 19 | Monmouth County, NJ | 67,761 |
| 20 | Norfolk County, MA | 67,689 |
| 21 | DuPage County, IL | 67,505 |
| 22 | Bergen County, NJ | 67,288 |
| 23 | Dakota County, MN | 67,216 |
| 24 | Westchester County, NY | 66,560 |
| 25 | Rockingham County, NH | 66,042 |
| 26 | Chester County, PA | 65,598 |
| 27 | Middlesex County, MA | 65,529 |
| 28 | Placer County, CA | 65,509 |
| 29 | Will County, IL | 65,186 |
| 30 | Waukesha County, WI | 63,826 |
| 31 | Johnson County, KS | 63,155 |
| 32 | Oakland County, MI | 63,024 |
| 33 | Plymouth County, MA | 62,888 |
| 34 | Solano County, CA | 62,742 |
| 35 | Middlesex County, NJ | 62,354 |
|
Reference