The median income of Carroll County residents was an inflation-adjusted $29,077 per year. Carroll County had 21,203 households in 2017, with a population of 47,524.
The county with the highest median resident income in the state was Rockingham County. Rockingham County's median income was $39,666 per year after adjusting for inflation – $10,589 more than Carroll County. It had 119,955 households in 2017 and a population of 302,479.
Coos County had the lowest annual resident income among counties in New Hampshire, with a median income of only $24,716 per year. That was $4,361 less than the median income in Carroll County at the time. Coos County had 13,879 households in 2017 and a population of 32,119.
The table below shows the state's counties ranked by median annual resident earnings in 2017.