Sorted by population.
| County | Population | Median HHI |
|---|---|---|
| Polk County IA |
456,618 | $84,359 |
| Johnson County IA |
198,308 | $72,248 |
| Linn County IA |
169,228 | $81,893 |
| Scott County IA |
166,547 | $79,991 |
| Dallas County IA |
145,027 | $113,751 |
| Black Hawk County IA |
142,724 | $69,203 |
| Dubuque County IA |
97,991 | $78,354 |
| Woodbury County IA |
92,957 | $71,585 |
| Boone County IA |
79,396 | $69,833 |
| Jasper County IA |
61,475 | $73,394 |
| Clinton County IA |
56,326 | $68,157 |
| Story County IA |
52,951 | $71,414 |
In alphabetical order; geographic adjacency layer planned for v1.1.
Every value drawn from the same federal-source warehouse that powers individual place profiles. See data sources for the full dictionary, methodology for metric definitions.