Loudoun County, Virginia, has the highest median household income among the nation’s counties, according to numbers released Dec. 6 by the U.S. Census Bureau.

Loudon’s median household income was $129,588, according to the Census Bureau’s five-year average for 2013-17. At the other end of the spectrum, McCreary County in Kentucky had the nation’s lowest median income, at $19,267.

Unlike the 2017 estimates released in September, which were limited to counties with at least 65,000 residents, the five-year estimates include all counties.

The U.S. median household income for 2013-17 was $57,652. The median for families was $70,850. (Household income includes all households, including single people living alone. Family households have at least two residents who are related to each other.

The above map shows the counties in the lower 48 states shaded by median household income for 2013-17. You can put your cursor over any county to see the underlying data. You also can drag the above map with your cursor, or click on the plus or minus sign in the lower left-hand corner if you need to enlarge or minimize the map.

Or you can use our online database below to look up a county by typing in its name. (Hint: If the name of the county appears in multiple states, click first on the state where the county you’re seeking is located.)

Unlike the map, the database includes Hawaii and Alaska, as well as median family income as well as household income. The database also specifies how each county ranks among the 3,142 counties in both median household and median family income.

In addition, you can choose a state and see a top-to-bottom ranking of all its counties by median household income.

2013-17 avg. median income by county

A couple of notes about the numbers: