Economic inequality in America is not just a national story — it is profoundly local. The gap between the highest-income counties and the lowest-income counties is staggering, exceeding $119,558 in median household income. That is larger than the median income of most countries.
We compared the 15 richest counties and the 15 poorest counties to make this gap visible. The data comes from the same Census Bureau source, collected using the same methodology — making this an apples-to-apples comparison of economic reality.
The 15 Richest Counties
Average median household income: $150,170
| Rank | County | State | Median Income | Per Capita Income |
|---|---|---|---|---|
| 1 | Loudoun County | Virginia | $181,765 | $71,986 |
| 2 | Santa Clara County | California | $164,281 | $80,312 |
| 3 | San Mateo County | California | $158,855 | $84,288 |
| 4 | Fairfax County | Virginia | $153,637 | $71,828 |
| 5 | Howard County | Maryland | $149,763 | $67,501 |
| 6 | Douglas County | Colorado | $149,594 | $69,608 |
| 7 | Marin County | California | $149,091 | $93,920 |
| 8 | Los Alamos County | New Mexico | $147,139 | $74,704 |
| 9 | Nassau County | New York | $146,202 | $64,198 |
| 10 | Forsyth County | Georgia | $143,784 | $58,249 |
| 11 | Falls Church city | Virginia | $143,262 | $88,790 |
| 12 | Arlington County | Virginia | $142,114 | $90,786 |
| 13 | Hunterdon County | New Jersey | $141,715 | $72,227 |
| 14 | San Francisco County | California | $140,970 | $92,289 |
| 15 | Somerset County | New Jersey | $140,374 | $72,193 |
The 15 Poorest Counties
Average median household income: $30,612
| Rank | County | State | Median Income | Per Capita Income |
|---|---|---|---|---|
| 1 | Owsley County | Kentucky | $22,188 | $18,731 |
| 2 | Randolph County | Georgia | $28,380 | $21,770 |
| 3 | Lake County | Tennessee | $28,814 | $16,062 |
| 4 | Greene County | Alabama | $29,200 | $20,358 |
| 5 | Wolfe County | Kentucky | $30,417 | $17,627 |
| 6 | Bullock County | Alabama | $31,310 | $19,271 |
| 7 | Bell County | Kentucky | $31,354 | $21,704 |
| 8 | Issaquena County | Mississippi | $31,429 | $18,718 |
| 9 | McDowell County | West Virginia | $31,559 | $17,253 |
| 10 | Claiborne County | Mississippi | $31,897 | $19,888 |
| 11 | Allendale County | South Carolina | $32,328 | $25,038 |
| 12 | Quitman County | Mississippi | $32,412 | $22,429 |
| 13 | Knox County | Kentucky | $32,527 | $20,708 |
| 14 | Holmes County | Mississippi | $32,538 | $22,845 |
| 15 | Claiborne Parish | Louisiana | $32,831 | $20,451 |
The Gap in Numbers
The average median household income in the top 15 counties is $150,170. In the bottom 15, it is $30,612. That is a gap of $119,558 — a 4.9x difference.
To put this in perspective: a family in the poorest county would need to more than triple their income to match the median of the richest county. This gap has widened over the past several decades as high-income counties benefit from agglomeration effects, while low-income counties face population loss and declining industries.
Geographic Patterns of Inequality
The richest counties cluster around major metropolitan areas — particularly Washington DC, New York, San Francisco, and Boston. The poorest counties are concentrated in specific regions:
- Appalachia: Eastern Kentucky, West Virginia, and southwestern Virginia counties have faced generational economic decline tied to coal industry collapse.
- The Deep South: Mississippi Delta counties and rural Louisiana parishes have persistent poverty rooted in agricultural economies and historical underinvestment.
- Tribal lands: Counties overlapping with Native American reservations in the Dakotas, Arizona, and New Mexico consistently rank among the lowest-income.
- The Texas border: Counties along the Rio Grande face unique economic challenges tied to cross-border dynamics and limited industry diversification.
Methodology
All data comes from the U.S. Census Bureau, American Community Survey (ACS) 5-Year Estimates (2019-2023). Counties are ranked by median household income. The gap analysis compares the top 15 and bottom 15 counties with complete data.
Data source: U.S. Census Bureau, American Community Survey (ACS) 5-Year Estimates (2019-2023). All figures are estimates based on survey data and may not reflect current economic conditions.