Census ACS · 3 counties
Richest Counties in Delaware
Income varies significantly across Delaware's 3 counties. New Castle County leads with a median household income of $89,901. County-level income data reveals economic disparities within the state that statewide averages can mask, affluent suburban counties often have incomes 2-3x higher than rural counties in the same state. These differences affect school funding, public services, and quality of life.
Source: Census ACS 5-Year Estimates
| # | County | Median Income | Population |
|---|---|---|---|
| 1 | Sussex County | $78,162 | 247,799 |
| 2 | New Castle County | $89,901 | 573,030 |
| 3 | Kent County | $72,872 | 185,043 |
More Rankings for Delaware
Frequently Asked Questions
New Castle County is the #1 ranked county in Delaware by median household income, with a value of $89,901 according to latest Census ACS data.
Delaware has 3 counties tracked in latest Census ACS data.
All data comes from the American Community Survey (ACS) 5-Year estimates by the US Census Bureau.
Data from the American Community Survey 5-Year estimates. Covers all counties in Delaware.
Source: U.S. Census Bureau ACS, 2026.