The median income of Marshall County residents was an inflation-adjusted $25,497 per year. Marshall County had 13,117 households in 2017, with a population of 31,177.
The county with the highest median resident income in the state was Oldham County. Oldham County's median income was $36,618 per year after adjusting for inflation – $11,121 more than Marshall County. It had 20,465 households in 2017 and a population of 64,633.
McCreary County had the lowest annual resident income among counties in Kentucky, with a median income of only $12,116 per year. That was $13,381 less than the median income in Marshall County at the time. McCreary County had 6,332 households in 2017 and a population of 17,748.
The table below shows the top 100 counties ranked by median annual resident earnings in 2017.