好象马里兰也是大学以上学历占人口比例最高的州(>70%)。这充分说明在美国，读书越多越有钱。书中自有黄金屋。
Median Household Income by State[53]
| Rank | State | 2009 | 2008 | 2007 | 2004–2006 | Cost of Living Index[54] | 2009 Data adjusted for COL |
|---|---|---|---|---|---|---|---|
| 1 | Maryland | $69,272 | $70,545 | $68,080 | $62,372 | 124.81 | $55,502 |
| 2 | New Jersey | $68,342 | $70,378 | $67,035 | $64,169 | 128.47 | $53,197 |
| 3 | Connecticut | $67,034 | $68,595 | $65,967 | $59,972 | 130.22 | $51,477 |
| 4 | Alaska | $66,953 | $68,460 | $64,333 | $57,639 | 132.64 | $50,477 |
| 5 | Hawaii | $64,098 | $67,214 | $63,746 | $60,681 | 165.56 | $38,716 |
| 6 | Massachusetts | $64,081 | $65,401 | $62,365 | $56,236 | 117.8 | $54,398 |
| 7 | New Hampshire | $60,567 | $63,731 | $62,369 | $60,489 | 116.68 | $51,909 |
| 8 | Virginia | $59,330 | $61,233 | $59,562 | $55,108 | 97.66 | $60,752 |
| District of Columbia | $59,290 | $57,936 | $54,317 | $47,221 (2005)[55] | 139.92 | $42,374 | |
| 9 | California | $58,931 | $61,021 | $59,948 | $53,770 | 132.56 | $44,456 |
| 10 | Delaware | $56,860 | $57,989 | $54,610 | $52,214 | 102.4 | $55,527 |
| 11 | Washington | $56,548 | $58,078 | $55,591 | $53,439 | 103.98 | $54,384 |
| 12 | Minnesota | $55,616 | $57,288 | $55,082 | $57,363 | 102.23 | $54,403 |
| 13 | Colorado | $55,430 | $56,993 | $55,212 | $54,039 | 102.23 | $54,221 |
| 14 | Utah | $55,117 | $56,633 | $55,109 | $55,179 | 95.15 | $57,926 |
| 15 | New York | $54,659 | $56,033 | $53,514 | $48,201 | 128.29 | $42,606 |
| 16 | Rhode Island | $54,119 | $55,701 | $53,568 | $52,003 | 123.25 | $43,910 |
| 17 | Illinois | $53,966 | $56,235 | $54,124 | $49,280 | 96.08 | $56,168 |
| 18 | Nevada | $53,341 | $56,361 | $55,062 | $50,819 | 101.39 | $52,610 |
| 19 | Wyoming | $52,664 | $53,207 | $51,731 | $47,227 | 98.66 | $53,379 |
| 20 | Vermont | $51,618 | $52,104 | $49,907 | $51,622 | 120.38 | $42,879 |
| United States | $50,221 | $52,029 | $50,740 | $46,242 (2005)[55] | |||
| 21 | Wisconsin | $49,993 | $52,094 | $50,578 | $48,874 | 96.45 | $51,833 |
| 22 | Pennsylvania | $49,520 | $50,713 | $48,576 | $47,791 | 100.67 | $49,190 |
| 23 | Arizona | $48,745 | $50,958 | $49,889 | $46,729 | 103.73 | $46,992 |
| 24 | Oregon | $48,457 | $50,169 | $48,730 | $45,485 | 110.47 | $43,864 |
| 25 | Texas | $48,259 | $50,043 | $47,548 | $43,425 | 91.04 | $53,009 |
| 26 | Iowa | $48,044 | $48,980 | $47,292 | $47,489 | 93.98 | $51,122 |
| 27 | North Dakota | $47,827 | $45,685 | $43,753 | $43,753 | 95.91 | $49,867 |
| 28 | Kansas | $47,817 | $50,177 | $47,451 | $44,264 | 91.31 | $52,368 |
| 29 | Georgia | $47,590 | $50,861 | $49,136 | $46,841 | 92.21 | $51,610 |
| 30 | Nebraska | $47,357 | $49,693 | $47,085 | $48,126 | 91.09 | $51,989 |
| 31 | Maine | $45,734 | $46,581 | $45,888 | $45,040 | 116.42 | $39,284 |
| 32 | Indiana | $45,424 | $47,966 | $47,448 | $44,806 | 94.19 | $48,226 |
| 33 | Ohio | $45,395 | $47,988 | $46,597 | $45,837 | 93.85 | $48,370 |
| 34 | Michigan | $45,255 | $48,591 | $47,950 | $47,064 | 95.25 | $47,512 |
| 35 | Missouri | $45,229 | $46,867 | $45,114 | $44,651 | 91.66 | $49,344 |
| 36 | South Dakota | $45,043 | $46,032 | $43,424 | $44,624 | 98.53 | $45,715 |
| 37 | Idaho | $44,926 | $47,576 | $46,253 | $46,395 | 93.04 | $48,287 |
| 38 | Florida | $44,736 | $47,778 | $47,804 | $44,448 | 98.39 | $45,468 |
| 39 | North Carolina | $43,674 | $46,549 | $44,670 | $42,061 | 96.21 | $45,394 |
| 40 | New Mexico | $43,028 | $43,508 | $41,452 | $40,827 | 98.88 | $43,515 |
| 41 | Louisiana | $42,492 | $43,733 | $40,926 | $37,943 | 96.15 | $44,193 |
| 42 | South Carolina | $44,625 | $43,329 | $40,822 | 98.71 | $42,997 | |
| 43 | Montana | $42,322 | $43,654 | $43,531 | $38,629 | 100 | $42,322 |
| 44 | Tennessee | $41,725 | $43,614 | $42,367 | $40,676 | 89.49 | $46,625 |
| 45 | Oklahoma | $41,664 | $42,822 | $41,567 | $40,001 | 90.09 | $46,247 |
| 46 | Alabama | $40,489 | $42,666 | $40,554 | $38,473 | 92.74 | $43,659 |
| 47 | Kentucky | $40,072 | $41,538 | $40,267 | $38,466 | 89.21 | $44,919 |
| 48 | Arkansas | $37,823 | $38,815 | $38,134 | $37,420 | 90.61 | $41,743 |
| 49 | West Virginia | $37,435 | $37,989 | $37,060 | $37,227 | 94.4 | $39,656 |
| 50 | Mississippi | $36,646 | $37,790 | $36,338 | $35,261 | 92.26 | $39,720 |
| Puerto Rico | $18,314 | $18,401 | $17,741 | $17,184 (2005)[55] |
