Income in the United States is usually reported one state at a time, and a single state figure can be misleading. Georgia is the clearest example in the country. It has 159 counties, more than any state except Texas, and the distance between the richest and the poorest is wider than anywhere else.
Forsyth County, a fast-growing suburb north of Atlanta, has a median household income of $138,000. Randolph County, in the rural southwest of the state, sits at $25,425. The richer county takes in more than five times what the poorer one does, the largest such ratio of any state. These figures come from the American Community Survey, the Census Bureau's annual household survey, which reports the same measures for every county in the country.
A typical Georgia county has a median household income of $55,714, below the national county figure of $63,690. But the typical county tells you little here, because the area around it is so large:
The state median household income of $55,714 sits between these places and describes none of them. It is the midpoint of two Georgias that share little beyond a border.
Forsyth and the rural counties of the south are only a few hours apart, but they have different economies. In Forsyth, 56.6% of adults hold a degree; in Randolph, the figure is 15.0%. A household in Forsyth would not recognise the job market, the cost of living, or the schools in Randolph or Terrell, and the reverse is just as true. Treated as one Georgia audience, the two ends average out on paper while staying completely distinct on the ground. A plan built around the state figure is built around a household that barely exists at either end.
For a long time, planning to a state or national average was the only affordable option. County-level and sub-county detail existed in the public data, but pulling it together for every market a campaign touched was slow and costly, so a single representative household stood in for a whole state. That was a sensible response to the cost of the work, not a mistake.
When the county picture is easy to see, the work changes. A budget split, a channel mix, a price, and a message all read differently once the spread inside a state is visible. A product priced for the Georgia middle is priced above most of the rural south and well below the northern suburbs at the same time. The same state, planned as one audience, usually misses both ends.
Cambium AI builds synthetic populations from this same public data, so a marketing or research team can see how income, age, and education actually sit across the counties a campaign will reach, before the budget is set. Georgia is the sharpest case, but every state has its own version of the same spread.
Data source: U.S. Census Bureau, American Community Survey (ACS) 5-Year Estimates