The median income of Greenville County residents was an inflation-adjusted $27,373 per year. Greenville County had 185,837 households in 2017, with a population of 490,332.
The county with the highest median resident income in the state was Charleston County. Charleston County's median income was $30,777 per year after adjusting for inflation – $3,404 more than Greenville County. It had 154,049 households in 2017 and a population of 387,847.
Allendale County had the lowest annual resident income among counties in South Carolina, with a median income of only $17,418 per year. That was $9,955 less than the median income in Greenville County at the time. Allendale County had 3,285 households in 2017 and a population of 9,402.
The table below shows the state's counties ranked by median annual resident earnings in 2017.