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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.

As of 2020, Loudoun County, Virginia, a suburb of Washington, D.C. in Northern Virginia has a median household income of $147,111, the highest of any county in the nation.^[1]

The chart below depicts the 100 highest income counties in the United States by median household income according to the 2020 United States census.^[2] Virginia has the most counties in the top 100 with 18 followed by California with 11; Maryland with 10; New Jersey with nine; New York and Texas with six each; Illinois with five; Colorado, Massachusetts, and Minnesota with four each; Ohio and Pennsylvania with three each; Georgia, Indiana, Utah, and Washington with two each; and Connecticut, Washington, D.C., Iowa, Kansas, Kentucky, New Hampshire, New Mexico, Tennessee, and Wisconsin with one each.

Rank	County or Equivalent	State	Median Household Income
1	Loudoun County	Virginia	$147,111
2	Falls Church	Virginia	$146,922
3	Santa Clara County	California	$130,890
4	San Mateo County	California	$128,091
5	Fairfax County	Virginia	$127,866
6	Howard County	Maryland	$124,042
7	Arlington County	Virginia	$122,604
8	Marin County	California	$121,671
9	Douglas County	Colorado	$121,393
10	Nassau County	New York	$120,036
11	Los Alamos County	New Mexico	$119,266
12	San Francisco County	California	$119,136
13	Hunterdon County	New Jersey	$117,858
14	Morris County	New Jersey	$117,298
15	Somerset County	New Jersey	$116,510
16	Forsyth County	Georgia	$112,834
17	Calvert County	Maryland	$112,696
18	Nantucket County	Massachusetts	$112,306
19	Stafford County	Virginia	$112,247
20	Montgomery County	Maryland	$111,812
21	Delaware County	Ohio	$111,411
22	Williamson County	Tennessee	$111,196
23	Fairfax	Virginia	$109,708
24	Prince William County	Virginia	$107,707
25	Putnam County	New York	$107,246
26	Summit County	Utah	$106,973
27	Middlesex County	Massachusetts	$106,202
28	Rockwall County	Texas	$105,956
29	Fauquier County	Virginia	$105,665
30	Suffolk County	New York	$105,362
31	Norfolk County	Massachusetts	$105,320
32	Alameda County	California	$104,888
33	Bergen County	New Jersey	$104,623
34	Elbert County	Colorado	$104,231
35	Chester County	Pennsylvania	$104,161
36	Carver County	Minnesota	$104,011
37	Contra Costa County	California	$103,997
38	Oldham County	Kentucky	$103,761
39	Charles County	Maryland	$103,678
40	Monmouth County	New Jersey	$103,523
41	Scott County	Minnesota	$103,261
42	Anne Arundel County	Maryland	$103,225
43	Alexandria	Virginia	$102,227
44	Broomfield County	Colorado	$101,206
45	Poquoson	Virginia	$100,696
46	Frederick County	Maryland	$100,685
47	Collin County	Texas	$100,541
48	Morgan County	Utah	$100,408
49	Fort Bend County	Texas	$100,189
50	Carroll County	Maryland	$99,569
51	Westchester County	New York	$99,489
52	King County	Washington	$99,158
53	Hamilton County	Indiana	$98,880
54	Kendall County	Texas	$98,692
55	New Kent County	Virginia	$97,688
56	Washington County	Minnesota	$97,584
57	Fairfield County	Connecticut	$97,539
58	Goochland County	Virginia	$97,146
59	Kendall County	Illinois	$96,854
60	King George County	Virginia	$96,711
61	Queen Anne's County	Maryland	$96,467
62	Sussex County	New Jersey	$96,222
63	St. Mary's County	Maryland	$95,864
64	DuPage County	Illinois	$94,930
65	Rockland County	New York	$94,840
66	Orange County	California	$94,441
67	Harford County	Maryland	$94,003
68	Rockingham County	New Hampshire	$93,962
69	Powhatan County	Virginia	$93,833
70	Fayette County	Georgia	$93,777
71	Placer County	California	$93,677
72	Montgomery County	Pennsylvania	$93,518
73	York County	Virginia	$93,356
74	Bucks County	Pennsylvania	$93,181
75	Plymouth County	Massachusetts	$92,906
76	Lake County	Illinois	$92,654
77	Napa County	California	$92,219
78	Middlesex County	New Jersey	$91,731
79	James City County	Virginia	$91,675
80	Johnson County	Kansas	$91,650
81	Hanover County	Virginia	$91,444
82	Spotsylvania County	Virginia	$90,913
83	Washington	District of Columbia	$90,842
84	Williamson County	Texas	$90,834
85	Will County	Illinois	$90,800
86	Gilpin County	Colorado	$90,547
87	Denton County	Texas	$90,354
88	Burlington County	New Jersey	$90,329
89	McHenry County	Illinois	$90,014
90	Santa Cruz County	California	$89,986
91	New York County	New York	$89,812
92	Boone County	Indiana	$89,444
93	Warren County	Ohio	$89,410
94	Ventura County	California	$89,295
95	Snohomish County	Washington	$89,273
96	Gloucester County	New Jersey	$89,056
97	Waukesha County	Wisconsin	$88,985
98	Union County	Ohio	$88,565
99	Dakota County	Minnesota	$88,468
100	Dallas County	Iowa	$88,368

Rank	County or Equivalent	State	Per Capita Inc
1	New York County	New York	$83,008
2	Marin County	California	$78,995
3	Arlington County	Virginia	$77,535
4	San Francisco County	California	$77,267
5	Falls Church	Virginia	$76,354
6	San Mateo County	California	$69,919
7	Alexandria	Virginia	$68,640
8	Gilpin County	Colorado	$66,627
9	Teton County	Wyoming	$66,296
10	Santa Clara County	California	$65,052
11	Los Alamos County	New Mexico	$64,521
12	Washington	District of Columbia	$63,793
13	Fairfax County	Virginia	$61,957
14	Morris County	New Jersey	$61,915
15	Westchester County	New York	$61,830
16	Somerset County	New Jersey	$61,805
17	Hunterdon County	New Jersey	$61,328
18	Loudoun County	Virginia	$61,045
19	Summit County	Utah	$60,768
20	Norfolk County	Massachusetts	$60,406
21	King County	Washington	$59,843
22	Montgomery County	Maryland	$59,384
23	Howard County	Maryland	$58,560
24	Middlesex County	Massachusetts	$58,399
25	Monmouth County	New Jersey	$57,836
26	Douglas County	Colorado	$57,481
27	Fairfax	Virginia	$57,091
28	Williamson County	Tennessee	$56,545
29	Nassau County	New York	$55,763
30	Bergen County	New Jersey	$55,710
31	Chester County	Pennsylvania	$55,702
32	Broomfield County	Colorado	$55,176
33	Alameda County	California	$53,815
34	Contra Costa County	California	$53,656
35	Loving County	Texas	$53,358
36	Montgomery County	Pennsylvania	$53,343
37	San Juan County	Washington	$52,881
38	Fulton County	Georgia	$52,842
39	Hamilton County	Indiana	$52,437
40	Boulder County	Colorado	$52,401
41	Delaware County	Ohio	$52,397
42	Nantucket County	Massachusetts	$52,324
43	Newport County	Rhode Island	$52,030
44	Bristol County	Rhode Island	$51,917
45	Johnson County	Kansas	$51,663
46	Rockingham County	New Hampshire	$51,627
47	Dukes County	Massachusetts	$51,354
48	Collier County	Florida	$51,296
49	Talbot County	Maryland	$51,234
50	Anne Arundel County	Maryland	$51,113
51	Ozaukee County	Wisconsin	$51,032
52	Waukesha County	Wisconsin	$50,837
53	Calvert County	Maryland	$50,496
54	Carver County	Minnesota	$50,492
55	Hennepin County	Minnesota	$50,478
56	DuPage County	Illinois	$50,344
57	Bucks County	Pennsylvania	$50,315
58	Elbert County	Colorado	$50,147
59	Barnstable County	Massachusetts	$49,973
60	Albemarle County	Virginia	$49,942
61	Putnam County	New York	$49,808
62	Kalawao County	Hawaii	$49,700
63	Boone County	Indiana	$49,666
64	Napa County	California	$49,641
65	Forsyth County	Georgia	$49,506
66	Fauquier County	Virginia	$49,440
	Lake County	Illinois	$49,440
68	Suffolk County	New York	$49,404
69	Travis County	Texas	$49,191
70	Queen Anne's County	Maryland	$49,178
71	Oakland County	Michigan	$49,012
72	Eagle County	Colorado	$49,010
73	Plymouth County	Massachusetts	$48,785
74	Placer County	California	$48,580
75	Collin County	Texas	$48,438
76	Suffolk County	Massachusetts	$47,916
77	Rockwall County	Texas	$47,802
78	Santa Cruz County	California	$47,619
79	North Slope Borough	Alaska	$47,585
80	Sonoma County	California	$47,580
81	Dallas County	Iowa	$47,488
82	Dunn County	North Dakota	$47,472
83	Scott County	Minnesota	$47,334
84	James City County	Virginia	$47,223
85	Burlington County	New Jersey	$47,065
86	Oldham County	Kentucky	$46,833
87	Frederick County	Maryland	$46,615
88	Fayette County	Georgia	$46,522
89	Essex County	Massachusetts	$46,263
90	Orange County	California	$46,099
91	Charleston County	South Carolina	$46,066
92	Washington County	Rhode Island	$45,956
93	Carroll County	Maryland	$45,800
94	Denton County	Texas	$45,782
95	Cumberland County	Maine	$45,704
96	Cape May County	New Jersey	$45,689
97	Orange County	North Carolina	$45,681
98	Stafford County	Virginia	$45,618
99	Juneau Borough	Alaska	$45,607
100	Washtenaw County	Michigan	$45,500

For more detailed lists of rankings of counties and places in the individual states, see the following pages:

• List of lowest-income counties in the United States
• List of United States counties by per capita income