List of highest - income counties in the United States - wikipedia List of highest - income counties in the United States This article is part of a series on Income in the United States of America Topics Household Personal Affluence Social class Income inequality gender pay gap ethnic wage gap Lists by income States ( by equality ( Gini ) ) Counties ( highest / lowest ) Locations ( lowest ) Metropolitan statistical areas Urban areas ZIP Code Tabulation Areas United States portal Per capita income by county There are 3,144 counties and county - equivalents in the United States. The source of the data is the U.S. Census Bureau and the data is current as of the indicated year. Independent cities are considered county - equivalent by the Census Bureau. Contents 1 Summary 2 Median household income 2.1 American Community Survey 2.2 2010 Census 2.3 2000 Census 3 Per capita income 3.1 2010 Census 3.2 2000 Census 4 Highest - income counties and places by state 5 See also 6 Notes and references Summary Before the American Civil War, the wealthiest counties were primarily located in Louisiana and Mississippi. The Loudoun County, Virginia suburb of Washington, D.C. is the highest - income county by median household income. Another Washington suburb, Arlington County, Virginia, ranks as the highest - income county by median family income. Many of the top counties in the following lists are found in the Northeast Megalopolis, particularly in the Washington metropolitan area and the New York metropolitan area. Median household income American Community Survey Presented below are the 25 highest - income counties ( with populations of 65,000 or greater ) in the United States by median household income according to the 2016 American Community Survey prepared by the US Census Bureau. Five of the counties are located in the state of Maryland, five are in Virginia, four in California, three in New Jersey, two in New York, and one each in : Colorado, Georgia, Massachusetts, Ohio, Tennessee, and Texas. Rank County State Median Household Income Loudoun County Virginia $134,464 Howard County Maryland $120,941 Fairfax County Virginia $115,717 Hunterdon County New Jersey $113,684 5 Santa Clara County California $111,069 6 Arlington County Virginia $110,388 7 Douglas County Colorado $109,292 8 San Mateo County California $108,627 9 Morris County New Jersey $106,985 10 Williamson County Tennessee $106,054 11 Nassau County New York $105,870 12 Somerset County New Jersey $104,478 13 Marin County California $103,845 14 San Francisco County California $103,801 15 Delaware County Ohio $101,693 16 Forsyth County Georgia $100,909 17 Montgomery County Maryland $99,763 18 Calvert County Maryland $98,732 19 Prince William County Virginia $97,986 20 Stafford County Virginia $97,484 21 Putnam County New York $96,992 22 Anne Arundel County Maryland $96,483 23 Charles County Maryland $95,735 24 Rockwall County Texas $95,731 25 Middlesex County Massachusetts $95,249 2011 Rank County State Median Household Income Population Loudoun County Virginia $119,134 325,405 Fairfax County Virginia $105,797 1,100,692 Arlington County Virginia $100,735 216,004 Hunterdon County New Jersey $99,099 128,038 5 Howard County Maryland $98,953 293,142 6 Somerset County New Jersey $96,360 324,893 7 Prince William County Virginia $95,146 419,096 8 Fauquier County Virginia $93,762 66,320 9 Douglas County Colorado $93,573 292,167 10 Montgomery County Maryland $92,909 989,794 11 Charles County Maryland $91,733 149,130 12 Nassau County New York $91,414 1,344,436 13 Stafford County Virginia $91,348 132,133 14 Morris County New Jersey $91,332 494,976 15 Putnam County New York $90,735 99,933 16 Calvert County Maryland $89,393 89,256 17 Williamson County Tennessee $86,962 188,560 18 Delaware County Ohio $85,365 178,341 19 Santa Clara County California $84,895 1,809,378 20 Oldham County Kentucky $84,447 64,800 21 York County Virginia $84,167 66,134 22 Anne Arundel Maryland $84,138 544,403 23 Carroll County Maryland $84,117 167,288 24 Suffolk County New York $84,106 1,498,816 25 Sussex County New Jersey $83,839 148,517 26 Carver County Minnesota $83,348 92,638 27 Alexandria City Virginia $82,748 144,301 28 Fort Bend County Texas $82,271 606,953 29 Collin County Texas $82,237 812,226 30 Rockland County New York $82,217 315,158 31 Forsyth County Georgia $82,209 181,840 32 Rockwall County Texas $82,061 81,290 33 Norfolk County Massachusetts $81,889 675,436 34 San Mateo County California $81,657 727,209 35 St. Mary 's County Maryland $81,657 107,484 36 Hamilton County Indiana $80,999 282,810 37 Scott County Minnesota $80,864 132,556 38 Kendall County Illinois $80,655 116,631 39 Monmouth County New Jersey $79,334 631,020 40 Bergen County New Jersey $79,272 911,004 41 Chester County Pennsylvania $79,160 503,897 42 Tolland County Connecticut $78,210 152,507 43 Harford County Maryland $78,123 246,489 44 Frederick County Maryland $77,791 236,745 45 Fairfield County Connecticut $77,289 925,899 46 Middlesex County Connecticut $77,193 166,043 47 Marin County California $77,168 255,031 48 Westchester County New York $77,006 955,899 49 Middlesex County Massachusetts $76,978 1,518,171 50 Washington County Minnesota $76,491 241,280 51 Spotsylvania County Virginia $76,475 124,327 52 Montgomery County Pennsylvania $76,220 804,210 53 Rockingham County New Hampshire $75,982 296,207 54 Ventura County California $74,623 831,771 55 Middlesex County New Jersey $74,522 814,217 56 Contra Costa County California $74,353 1,066,096 57 Lake County Illinois $74,266 706,222 58 DuPage County Illinois $74,072 923,222 59 Mercer County New Jersey $73,890 367,063 60 Ozaukee County Wisconsin $73,703 86,568 60 Fayette County Georgia $72,962 107,784 61 Burlington County New Jersey $72,896 449,576 62 Anchorage City Alaska $72,813 295,570 63 Waukesha County Wisconsin $72,562 390,730 64 Orange County California $72,293 3,055,745 65 Will County Illinois $71,882 681,545 66 Gloucester County New Jersey $71,850 289,104 67 James City County Virginia $71,667 68,200 68 Chesterfield County Virginia $71,110 320,277 69 Prince George 's County Maryland $70,715 871,233 70 Bucks County Pennsylvania $70,617 626,854 71 Richmond County New York $70,578 470,467 72 McHenry County Illinois $70,117 308,944 73 Dakota County Minnesota $69,902 402,006 74 San Francisco County California $69,894 812,826 75 Johnson County Kansas $69,856 552,991 76 Dallas County Iowa $69,831 69,444 77 Parker County Texas $69,703 118,376 78 Denton County Texas $69,644 686,406 79 Washington County Rhode Island $69,528 126,563 80 Warren County Ohio $69,201 214,910 81 Frederick County Virginia $69,155 79,666 82 Newport County Rhode Island $69,119 82,695 83 Litchfield County Connecticut $69,097 188,789 84 Davis County Utah $69,021 311,811 85 Placer County California $68,959 357,138 86 King County Washington $68,775 1,969,722 87 Matanuska - Susitna Borough Alaska $68,672 91,946 88 Boulder County Colorado $68,637 299,378 89 Plymouth County Massachusetts $68,253 497,579 90 Wright County Minnesota $68,242 126,437 91 Dutchess County New York $67,727 297,999 92 Olmsted County Minnesota $67,618 145,769 93 Alameda County California $67,558 1,529,875 93 Hanover County Virginia $67,505 100,342 94 Livingston County Michigan $67,441 181,722 95 Williamson County Texas $67,246 442,782 96 Washington County Texas $67,232 33,791 97 Sherburne County Minnesota $67,198 89,319 98 Hillsborough County New Hampshire $66,609 401,696 2010 Census Rank County Median Household Income Loudoun County, Virginia $115,574 City of Falls Church, Virginia $114,409 Fairfax County, Virginia $105,416 Los Alamos County, New Mexico $103,643 5 Howard County, Maryland $103,273 6 Hunterdon County, New Jersey $100,980 7 Oakland County, Michigan $99,198 8 City of Fairfax, Virginia $97,900 9 Somerset County, New Jersey $97,440 10 Morris County, New Jersey $96,747 11 Arlington County, Virginia $94,880 12 Nassau County, New York $93,613 13 Montgomery County, Maryland $93,373 14 Stafford County, Virginia $93,065 15 Prince William County, Virginia $91,098 16 Calvert County, Maryland $90,838 17 Marin County, California $89,268 18 Putnam County, New York $89,218 19 Charles County, Maryland $88,825 20 Delaware County, Ohio $87,908 21 Williamson County, Tennessee $87,832 22 Forsyth County, Georgia $87,605 23 Santa Clara County, California $86,850 24 San Mateo County, California $85,648 25 Chester County, Pennsylvania $84,741 26 Suffolk County, New York $84,506 27 City of Poquoson, Virginia $84,315 28 Fauquier County, Virginia $83,877 29 Anne Arundel County, Maryland $83,456 30 Sussex County, New Jersey $83,089 31 Rockland County, New York $82,534 32 Monmouth County, New Jersey $82,265 33 Fayette County, Georgia $82,216 34 Scott County, Minnesota $82,190 35 Hamilton County, Indiana $81,947 36 Bergen County, New Jersey $81,708 37 Frederick County, Maryland $81,686 38 Carroll County, Maryland $81,621 39 Fairfield County, Connecticut $81,268 40 Queen Anne 's County, Maryland $81,096 41 York County, Virginia $81,055 42 Norfolk County, Massachusetts $81,027 43 City of Alexandria, Virginia $80,847 44 Collin County, Texas $80,504 45 Carver County, Minnesota $80,280 46 St. Mary 's County, Maryland $80,053 47 Kendall County, Illinois $79,897 48 Fort Bend County, Texas $79,845 49 Westchester County, New York $79,619 50 Goochland County, Virginia $79,547 51 Summit County, Utah $79,461 52 Oldham County, Kentucky $79,417 53 Washington County, Minnesota $79,109 54 Elbert County, Colorado $78,958 55 Lake County, Illinois $78,948 56 Contra Costa County, California $78,385 57 Rockwall County, Texas $78,032 58 Middlesex County, New Jersey $77,615 59 Middlesex County, Massachusetts $77,377 60 Tolland County, Connecticut $77,175 61 Harford County, Maryland $77,010 62 DuPage County, Illinois $76,581 63 Spotsylvania County, Virginia $76,574 64 McHenry County, Illinois $76,482 65 Hanover County, Virginia $76,425 66 Montgomery County, Pennsylvania $76,380 67 Burlington County, New Jersey $76,258 68 King George County, Virginia $76,241 69 Will County, Illinois $75,906 70 Rockingham County, New Hampshire $75,825 71 City and County of Broomfield, Colorado $75,590 72 Ventura County, California $75,348 73 City of Manassas, Virginia $75,173 74 Waukesha County, Wisconsin $75,064 75 Ozaukee County, Wisconsin $74,996 76 Middlesex County, Connecticut $74,906 77 Bucks County, Pennsylvania $74,828 78 Placer County, California $74,447 79 Orange County, California $74,344 80 James City County, Virginia $73,903 81 Johnson County, Kansas $73,733 82 Powhatan County, Virginia $73,593 83 Clarke County, Virginia $73,244 84 Plymouth County, Massachusetts $73,131 85 Dakota County, Minnesota $72,850 86 Gloucester County, New Jersey $72,664 87 Aleutians West Census Area, Alaska $72,219 88 Livingston County, Michigan $72,129 89 Eagle County, Colorado $71,337 90 Chesterfield County, Virginia $71,321 91 Warren County, Ohio $71,274 92 Prince George 's County, Maryland $71,260 93 Mercer County, New Jersey $71,217 94 Richmond County, New York $71,084 95 Denton County, Texas $70,622 96 New Kent County, Virginia $70,590 97 St. Charles County, Missouri $70,331 98 Honolulu County, Hawaii $70,093 99 El Dorado County, California $70,000 100 Alameda County, California $69,384 2009 The rankings are based on the median annual household income estimates from 2005 to 2009 in each county in the nation, provided by the United States Census Bureau 's American Community Survey, in 2009 inflation - adjusted dollars. Since cities in Virginia are independent of surrounding counties they are included in the Census Bureau 's ranking. Number of counties by state in following list : Virginia 5 plus 3 independent cities, Maryland 4, New Jersey 3, New York 3, California 2, Colorado 1, Georgia 1, New Mexico 1, Ohio 1, Tennessee 1. Of the top 25 counties, 10 are part of the Baltimore - Washington Metropolitan Area, 6 counties are part of the New York Metropolitan Area, and 2 counties are part of the San Francisco Bay Area. By Census region, 14 counties are located in the South, 6 in the Northeast, 4 in the West, and 1 located in the Midwest. 17 of the 25 counties are part of the densely populated Northeast Megalopolis. 2009 Rank County 2005 -- 09 ACS Median household income 2005 -- 09 ACS Margin of error 2000 Census Median household income 2000 Census Margin of error Change from 2000 Census to 2005 -- 09 ACS City of Falls Church, Virginia $113,313 3,595 96,449 5,613 16,864 Loudoun County, Virginia $112,021 1,833 103,817 1,477 8,204 Fairfax County, Virginia $104,259 955 104,335 709 − 76 Hunterdon County, New Jersey $102,500 2,533 102,839 1,717 − 339 5 Howard County, Maryland $101,003 1,325 95,474 1,128 5,529 6 Los Alamos County, New Mexico $100,423 5,635 101,687 4,364 − 1,264 7 Douglas County, Colorado $99,522 1,394 106,754 1,402 − 7,232 8 Morris County, New Jersey $96,316 1,374 99,559 1,085 − 3,243 9 Somerset County, New Jersey $96,233 1,782 99,035 1,399 − 2,802 10 City of Fairfax, Virginia $96,232 5,204 87,075 3,616 9,157 11 Arlington County, Virginia $93,806 1,652 81,101 1,183 12,705 12 Nassau County, New York $92,450 800 92,724 463 − 274 13 Montgomery County, Maryland $92,213 962 92,107 635 106 14 Calvert County, Maryland $90,621 2,753 84,890 1,868 5,731 15 Stafford County, Virginia $90,586 1,895 86,003 1,555 4,583 16 Prince William County, Virginia $88,850 1,545 84,910 959 3,940 17 Williamson County, Tennessee $88,358 1,787 88,957 1,769 − 599 18 Forsyth County, Georgia $88,040 1,808 88,681 1,803 − 641 19 Putnam County, New York $88,036 2,574 93,044 1,503 − 5,008 20 Marin County, California $87,728 1,569 91,792 1,314 − 4,064 21 Charles County, Maryland $86,141 2,341 80,068 1,460 6,073 22 Santa Clara County, California $85,569 864 95,691 507 − 10,122 23 Delaware County, Ohio $85,054 2,214 86,581 1,697 − 1,527 24 City of Poquoson, Virginia $84,688 5,283 78,422 3,527 6,266 25 Suffolk County, New York $84,530 803 84,045 403 485 2008 This data is average 2006 -- 2008 from the American Community Survey of the United States Bureau of the Census. Number of counties by state in following lists : Virginia 6 plus 2 independent cities, Maryland 4, New Jersey 3, New York 3, California 2, Colorado 1, Georgia 1, Pennsylvania 1, Tennessee 1, Utah 1. Of the top 25 counties, 11 are part of the Washington Metropolitan Area, 6 counties are part of the New York Metropolitan Area, and 2 counties are part of the San Francisco Bay Area. By Census region, 14 counties are located in the South, 7 in the Northeast, 4 in the West, with none located in the Midwest. 18 of the 25 counties are part of the densely populated Northeast Megalopolis. Educational attainment is based on bachelor 's degree attainment ( and above ) for people 25 and older in the county. 2008 Rank County Median Household Income Population Educational Attainment Loudoun County, Virginia $110,643 277,433 58 % Fairfax County, Virginia $106,785 1,005,980 60 % Howard County, Maryland $101,710 272,412 60 % Somerset County, New Jersey $103,227 321,589 53 % 5 Hunterdon County, New Jersey $100,947 129,000 52 % 6 City of Fairfax, Virginia $98,133 23,281 52 % 7 Morris County, New Jersey $97,565 486,459 52 % 8 Douglas County, Colorado $97,480 270,286 54 % 9 Arlington County, Virginia $96,390 204,889 71 % 10 Montgomery County, Maryland $93,999 942,747 59 % 11 Nassau County, New York $93,579 1,352,817 45 % 12 Stafford County, Virginia $89,536 120,219 36 % 13 Calvert County, Maryland $89,049 88,126 30 % 14 Prince William County, Virginia $88,675 358,719 38 % 15 Putnam County, New York $88,580 99,195 40 % 16 Goochland County, Virginia $88,552 20,494 32 % 17 Williamson County, Tennessee $88,316 165,336 53 % 18 Marin County, California $88,101 246,985 55 % 19 Santa Clara County, California $87,287 1,734,756 46 % 20 Forsyth County, Georgia $86,938 158,009 46 % 21 Charles County, Maryland $86,586 140,032 28 % 22 Summit County, Utah $85,258 35,448 53 % 23 City of Alexandria, Virginia $85,135 140,657 63 % 24 Chester County, Pennsylvania $84,844 485,083 51 % 25 Suffolk County, New York $84,767 1,510,716 34 % United States $52,175 304,374,846 27 % 2007 Number of counties by state in following lists : Virginia 6, Maryland 5, New Jersey 3, New York 2, California 2, Colorado 1, Georgia 1. 10 of the 20 counties are part of the Washington Metropolitan Area and 5 counties are part of the New York Metropolitan Area. By Census region, 12 counties are located in the South, 5 in the Northeast, and 3 in the West. 16 of the 20 counties are part of the densely populated Northeast Megalopolis. 2007 -- Counties with populations of 250,000 or more Rank County Median Household Income Loudoun County, Virginia $107,207 Fairfax County, Virginia $105,241 Howard County, Maryland $101,672 Somerset County, New Jersey $97,658 5 Morris County, New Jersey $94,684 6 Douglas County, Colorado $92,824 7 Montgomery County, Maryland $91,835 8 Suffolk County, New York $89,782 9 Prince William County, Virginia $87,243 10 Santa Clara County, California $84,360 2007 -- Counties with populations 65,000 -- 250,000 Rank County Median Household Income Hunterdon County, New Jersey $100,327 Calvert County, Maryland $95,134 Arlington County, Virginia $94,876 Stafford County, Virginia $87,629 5 Fauquier County, Virginia $84,888 6 Forsyth County, Georgia $84,872 7 Putnam County, New York $84,624 8 Marin County, California $83,870 9 Charles County, Maryland $83,412 10 Carroll County, Maryland $82,492 2006 Source : US Census Bureau, 2006 American Community Survey, via Forbes Number of counties by state in the top 20 : Virginia 5 plus 1 independent city, California 3, Maryland 3, New Jersey 3, New York 2, Colorado 1, Georgia 1, Tennessee 1. Forty - two states do not have any counties in the top 20. 2006 Rank County Median Household Income Fairfax County, Virginia $100,318 Loudoun County, Virginia $99,371 Howard County, Maryland $94,260 Hunterdon County, New Jersey $93,297 5 Douglas County, Colorado $92,125 6 Somerset County, New Jersey $91,688 7 Morris County, New Jersey $89,587 8 Montgomery County, Maryland $87,624 9 Arlington County, Virginia $87,350 10 Suffolk County, New York $85,994 11 Marin County, California $85,892 12 Stafford County, Virginia $85,014 13 Calvert County, Maryland $84,891 14 Santa Clara County, California $84,838 15 Forsyth County, Georgia $83,682 16 San Mateo County, California $82,123 17 Putnam County, New York $81,907 18 Williamson County, Tennessee $81,449 19 Prince William County, Virginia $80,783 20 City of Alexandria, Virginia $80,449 2000 Census Number of counties by state in the top 100 100 highest counties by median household income Source : US Census Bureau : 2000 Census Number of counties by state in the top 100 : Virginia 10 plus 5 independent cities, Maryland 9, California 8, New Jersey 8, Georgia 7, Colorado 6, Illinois 6, Minnesota 5, New York 5, Texas 5, Alaska 3, Connecticut 3, Ohio 3, Pennsylvania 3, Wisconsin 2, Massachusetts 2, Michigan 2, Indiana 1, Kansas 1, Kentucky 1, Missouri 1, New Hampshire 1, New Mexico 1, Tennessee 1, Utah 1. Twenty - five states do not have any counties in the top 100. United States of America : $41,994 Rank County Median Household Income Douglas County, Colorado $82,929 Fairfax County, Virginia $81,050 Loudoun County, Virginia $80,648 Hunterdon County, New Jersey $79,888 5 Los Alamos County, New Mexico $78,993 6 Morris County, New Jersey $77,340 7 Somerset County, New Jersey $76,933 8 City of Falls Church, Virginia $74,924 9 Santa Clara County, California $74,335 10 Howard County, Maryland $74,167 11 Suffolk County, New York $73,979 12 Nassau County, New York $72,030 13 Montgomery County, Maryland $71,551 14 Marin County, California $71,306 15 Fayette County, Georgia $71,227 16 Hamilton County, Indiana $71,026 17 Collin County, Texas $70,835 18 San Mateo County, California $70,819 19 Johnson County, Kansas $69,817 20 Williamson County, Tennessee $69,104 21 Forsyth County, Georgia $68,890 22 Rockland County, New York $67,971 23 DuPage County, Illinois $67,887 24 City of Fairfax, Virginia $67,642 25 Livingston County, Michigan $67,400 26 Delaware County, Ohio $67,258 27 Lake County, Illinois $66,973 28 Stafford County, Virginia $66,809 29 Scott County, Minnesota $66,612 30 Washington County, Minnesota $66,305 31 Prince William County, Virginia $65,960 32 Calvert County, Maryland $65,945 33 Carver County, Minnesota $65,540 34 Columbia County, Georgia $65,507 35 Chester County, Pennsylvania $65,295 36 Putnam County, New York $65,288 37 Sussex County, New Jersey $65,266 38 Fairfield County, Connecticut $65,249 39 Bergen County, New Jersey $65,241 40 Rockwall County, Texas $65,164 41 Summit County, Utah $64,962 42 McHenry County, Illinois $64,826 43 Kendall County, Illinois $64,625 44 Monmouth County, New Jersey $64,231 45 City and County of Broomfield, Colorado $63,903 46 Fort Bend County, Texas $63,831 47 Contra Costa County, California $63,675 48 Westchester County, New York $63,582 49 Norfolk County, Massachusetts $63,432 50 Oldham County, Kentucky $63,229 51 North Slope Borough, Alaska $63,173 52 Arlington County, Virginia $63,001 53 Waukesha County, Wisconsin $62,839 54 Ozaukee County, Wisconsin $62,745 55 Eagle County, Colorado $62,682 56 Elbert County, Colorado $62,480 57 Will County, Illinois $62,238 58 Charles County, Maryland $62,199 59 City and Borough of Juneau, Alaska $62,034 60 Fauquier County, Virginia $61,999 61 Oakland County, Michigan $61,907 62 Orange County, California $61,899 63 Dakota County, Minnesota $61,863 64 Anne Arundel County, Maryland $61,768 65 Middlesex County, New Jersey $61,446 66 Aleutians West Census Area, Alaska $61,406 67 City of Poquoson, Virginia $60,920 68 Cherokee County, Georgia $60,896 69 Montgomery County, Pennsylvania $60,829 70 Middlesex County, Massachusetts $60,821 71 City of Manassas Park, Virginia $60,794 72 Williamson County, Texas $60,642 73 Gwinnett County, Georgia $60,537 74 City of Manassas, Virginia $60,409 75 Frederick County, Maryland $60,276 76 Geauga County, Ohio $60,200 77 Carroll County, Maryland $60,021 78 Bucks County, Pennsylvania $59,727 79 Ventura County, California $59,666 80 Pitkin County, Colorado $59,375 81 Kane County, Illinois $59,351 82 Hanover County, Virginia $59,223 83 Middlesex County, Connecticut $59,175 84 Tolland County, Connecticut $59,044 85 Burlington County, New Jersey $58,608 86 Chesterfield County, Virginia $58,537 87 Cobb County, Georgia $58,289 88 Denton County, Texas $58,216 89 Rockingham County, New Hampshire $58,150 90 York County, Virginia $57,956 91 Warren County, Ohio $57,952 92 Anoka County, Minnesota $57,754 93 Placer County, California $57,535 94 Spotsylvania County, Virginia $57,525 95 San Benito County, California $57,469 96 Jefferson County, Colorado $57,339 97 Henry County, Georgia $57,309 98 St. Charles County, Missouri $57,258 99 Harford County, Maryland $57,234 100 Queen Anne 's County, Maryland $57,037 Per capita income 2010 Census CA1 - 3 Personal income summary : Per capita personal income, 2010, BEA Rank County Per Capita Personal Income New York County, New York $111,386 Teton County, Wyoming $94,672 Marin County, California $89,936 Howard County, Maryland $80,165 5 Arlington County, Virginia $79,967 6 Alexandria, Virginia $76,362 7 Pitkin County, Colorado $76,318 8 Town and County of Nantucket, Massachusetts $73,654 9 Westchester County, New York $73,159 10 Fairfield County, Connecticut $71,768 11 District of Columbia ( federal district ) $70,710 12 City and County of San Francisco, California $70,190 13 Somerset County, New Jersey $69,886 14 Morris County, New Jersey $69,811 15 Summit County, Utah $68,524 16 San Mateo County, California $67,964 17 Montgomery County, Maryland $67,639 18 Slope County, North Dakota $67,089 19 Hunterdon County, New Jersey $67,053 20 Fairfax County & Fairfax City & Falls Church, Virginia $66,679 21 Douglas County, Colorado $66,047 22 Nassau County, New York $65,615 23 Bergen County, New Jersey $65,486 24 Blaine County, Idaho $63,883 25 Howard County, Maryland $63,375 Average per capita income 2009 Number of counties by state in the top 20 : New Jersey 4 ; California 3 ; New York 2 ; Virginia 1 county, 1 independent city, and 1 statistical unit comprising a county and two independent cities ; Colorado, Connecticut, Florida, Idaho, Maryland, Texas, South Dakota, and Wyoming 1 each. Of the 20 counties, 7 are part of the New York Metropolitan Area, 4 are part of the Washington Metropolitan Area, and 3 are part of the San Francisco Bay Area. By Census region, 7 counties are located in the Northeast, 6 in the South, and 6 in the West. Average per capita income 2009 Rank County Average Per Capita Income Teton County, Wyoming $132,728 New York County, New York $120,790 Loving County, Texas $99,593 Pitkin County, Colorado $93,465 5 Marin County, California $91,483 6 Suffolk County, New York $91,376 7 Fairfield County, Connecticut $74,878 8 San Mateo County, California $71,753 9 Morris County, New Jersey $71,713 10 City and County of San Francisco, California $71,342 11 Somerset County, New Jersey $70,949 12 City of Alexandria, Virginia $70,632 13 Arlington County, Virginia $68,270 14 Fairfax County, City of Fairfax, and Falls Church, Virginia $67,909 15 Montgomery County, Maryland $67,525 16 Bergen County, New Jersey $67,125 17 Hunterdon County, New Jersey $66,449 18 Sully County, South Dakota $64,352 19 Blaine County, Idaho $64,207 20 Collier County, Florida $63,276 2000 Census Number of counties ranked in the top 100 nationally, by state 100 highest ranked counties by per capita income Number of counties by state in the top 100 : Colorado 10, Virginia 7 counties plus 3 independent cities, New Jersey 9, California 8, Florida 6, New York 6, Georgia 4, Maryland 4, Minnesota 4, Connecticut 3, Massachusetts 3, Michigan 3, Pennsylvania 3, Texas 3, Illinois 2, North Carolina 2, Ohio 2, Washington 2, Wisconsin 2, Idaho 1, Alaska 1, Alabama 1, District of Columbia 1, Indiana 1, Kansas 1, Missouri 1, Nevada 1, New Hampshire 1, New Mexico 1, Rhode Island 1, Tennessee 1, Utah 1, Wyoming 1. Eighteen states do not have any counties in the top 100. United States of America per capita average : $21,587 Rank County Per Capita Income Marin County, California $44,962 New York County, New York ( Manhattan ) $42,922 City of Falls Church, Virginia $41,052 Pitkin County, Colorado $40,811 5 Fairfield County, Connecticut $38,350 6 Teton County, Wyoming $38,260 7 Somerset County, New Jersey $37,970 8 Arlington County, Virginia $37,706 9 City of Alexandria, Virginia $37,645 10 Morris County, New Jersey $36,964 11 Fairfax County, Virginia $36,888 12 Westchester County, New York $36,726 13 Hunterdon County, New Jersey $36,370 14 San Mateo County, California $36,045 15 Montgomery County, Maryland $35,684 16 San Miguel County, Colorado $35,329 17 Douglas County, Colorado $34,848 18 Los Alamos County, New Mexico $34,646 19 City and County of San Francisco, California $34,556 20 Summit County, Utah $33,767 21 Bergen County, New Jersey $33,638 22 Loudoun County, Virginia $33,530 23 Collin County, Texas $33,345 24 Hamilton County, Indiana $33,109 25 Santa Clara County, California $32,795 26 Oakland County, Michigan $32,534 27 Williamson County, Tennessee $32,496 28 Norfolk County, Massachusetts $32,484 29 Howard County, Maryland $32,402 30 Nassau County, New York $32,151 31 Lake County, Illinois $32,102 32 Eagle County, Colorado $32,011 33 Ozaukee County, Wisconsin $31,947 34 Chester County, Pennsylvania $31,627 35 Delaware County, Ohio $31,600 36 Blaine County, Idaho $31,346 37 DuPage County, Illinois $31,315 38 Town and County of Nantucket, Massachusetts $31,314 39 City of Fairfax, Virginia $31,247 40 Middlesex County, Massachusetts $31,199 41 Collier County, Florida $31,195 42 Monmouth County, New Jersey $31,149 43 Johnson County, Kansas $30,919 44 Montgomery County, Pennsylvania $30,898 45 Contra Costa County, California $30,615 46 San Juan County, Washington $30,603 47 Putnam County, New York $30,127 48 Fulton County, Georgia $30,003 49 Ventura County, California $29,634 50 Martin County, Florida $29,584 51 King County, Washington $29,521 52 Fayette County, Georgia $29,464 53 James City County, Virginia $29,256 54 Waukesha County, Wisconsin $29,164 55 Forsyth County, Georgia $29,114 56 Goochland County, Virginia $29,105 57 Boulder County, Colorado $28,976 58 Albemarle County, Virginia $28,852 59 Palm Beach County, Florida $28,801 60 Routt County, Colorado $28,792 61 Hennepin County, Minnesota $28,789 62 Fauquier County, Virginia $28,757 63 Summit County, Colorado $28,676 64 St. Johns County, Florida $28,674 65 Washington, D.C. $28,659 66 Rockwall County, Texas $28,573 67 Carver County, Minnesota $28,486 68 Litchfield County, Connecticut $28,408 69 Sarasota County, Florida $28,326 70 Middlesex County, Connecticut $28,251 71 Talbot County, Maryland $28,164 72 Clear Creek County, Colorado $28,160 73 Washington County, Minnesota $28,148 74 Arapahoe County, Colorado $28,147 75 Rockland County, New York $28,082 76 Livingston County, Michigan $28,069 77 Jefferson County, Colorado $28,066 78 Placer County, California $27,963 79 Geauga County, Ohio $27,944 80 Mercer County, New Jersey $27,914 81 Cobb County, Georgia $27,863 82 St. Louis County, Missouri $27,595 83 Anne Arundel County, Maryland $27,578 84 Bucks County, Pennsylvania $27,430 85 Mecklenburg County, North Carolina $27,352 86 Douglas County, Nevada $27,288 87 Indian River County, Florida $27,227 88 Shelby County, Alabama $27,176 89 Washtenaw County, Michigan $27,173 90 Dakota County, Minnesota $27,008 91 Wake County, North Carolina $27,004 92 Sussex County, New Jersey $26,992 93 Union County, New Jersey $26,992 94 Denton County, Texas $26,895 95 Newport County, Rhode Island $26,779 96 City and Borough of Juneau, Alaska $26,719 97 Alameda County, California $26,680 98 Rockingham County, New Hampshire $26,656 99 Suffolk County, New York $26,577 100 Middlesex County, New Jersey $26,535 Highest - income counties and places by state For more detailed lists of rankings of counties and places in the individual states, see the following pages : Alabama Alaska Arizona Arkansas California Colorado Connecticut Delaware Florida Georgia Hawaii Idaho Illinois Indiana Iowa Kansas Kentucky Louisiana Maine Maryland Massachusetts Michigan Minnesota Mississippi Missouri Montana Nebraska Nevada New Hampshire New Jersey New Mexico New York North Carolina North Dakota Ohio Oklahoma Oregon Pennsylvania Rhode Island South Carolina South Dakota Tennessee Texas Utah Vermont Virginia Washington West Virginia Wisconsin Wyoming See also List of United States counties by per capita income List of lowest - income counties in the United States Notes and references Jump up ^ Frasier, Steve. `` Ruling America ''. Harvard University Press. Jump up ^ `` Washington region boasts four richest counties in U.S. '' American City Business Journals. Jump up ^ Ross, Kelley L. ( 2017 ). `` The Ruling Class, The Hunger Games : The One Percent ''. Political Economy. The Proceedings of the Friesian School, Fourth Series. Archived from the original on December 16, 2017. Retrieved December 15, 2017. What is especially striking about the chart is something that we might not expect. Of the original 25 counties listed, 11 of them, all in red, form a ring in Maryland and Virginia right around Washington, D.C. CS1 maint : BOT : original - url status unknown ( link ) Jump up ^ `` American Fact Finder ''. United States Census Bureau. Retrieved April 13, 2018. Jump up ^ Top 100 counties -- Median household income, 2011. Washingtonpost.com ( September 20, 2012 ). Retrieved on 2013 - 07 - 21. Jump up ^ American FactFinder. Factfinder2.census.gov. Retrieved on 2013 - 07 - 21. Jump up ^ State and County QuickFacts Archived March 4, 2012, at the Wayback Machine... Quickfacts.census.gov ( February 20, 2013 ). Retrieved on 2013 - 07 - 21. Jump up ^ Median Household Income in 2009 Inflation - Adjusted Dollars based on the 2005 -- 09 American Community Survey, United States Census Bureau. Retrieved December 24, 2011. Jump up ^ `` Census Bureau Homepage ''. Census.gov. March 26, 2012. Retrieved April 14, 2012. Jump up ^ `` Income, Earnings, and Poverty Data From the 2007 American Community Survey '' ( PDF ). Retrieved April 14, 2012. Jump up ^ Matt Woolsey, America 's Richest Counties, Forbes.com, 01.22. 08, 6 : 00 PM ET Forbes.com Web site. Retrieved 2008 - 02 - 08. ^ Jump up to : `` Census 2000 Demographic Profiles ''. Censtats.census.gov. Archived from the original on July 15, 2011. Retrieved April 14, 2012. Jump up ^ `` Interactive Data ''. U.S. Bureau of Economic Analysis. Retrieved October 7, 2012. Jump up ^ Aristide Economoupolos / The Star - Leder. `` N.J. has four of nation 's 20 highest - income counties ''. Nj.com. Retrieved April 14, 2012. United States locations by per capita income Nationwide U.S. states by per capita income United States counties by per capita income State locations Alabama Alaska Arizona Arkansas California Colorado Connecticut Delaware Florida Georgia Hawaii Idaho Illinois Indiana Iowa Kansas Kentucky Louisiana Maine Maryland Massachusetts Michigan Minnesota Mississippi Missouri Montana Nebraska Nevada New Hampshire New Jersey New Mexico New York North Carolina North Dakota Ohio Oklahoma Oregon Pennsylvania ( counties ) Pennsylvania ( places ) Rhode Island South Carolina South Dakota Tennessee Texas Utah Vermont Virginia Washington West Virginia Wisconsin Wyoming Related lists Highest - income counties in the United States Highest - income metropolitan statistical areas in the United States Highest - income urban areas in the United States Highest - income ZCTAs in the United States Lowest - income counties in the United States Poorest places in the United States United States county - related lists General Index By state Former counties Secession proposals Demographics Population African - 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Question: what is the average income in marin county
Answer: $103,845