The median income of Essex County residents was an inflation-adjusted $33,114 per year. Essex County had 291,659 households in 2017, with a population of 775,860.
The county with the highest median resident income in the state was Norfolk County. Norfolk County's median income was $42,889 per year after adjusting for inflation – $9,775 more than Essex County. It had 262,324 households in 2017 and a population of 694,389.
Hampshire County had the lowest annual resident income among counties in Massachusetts, with a median income of only $25,761 per year. That was $7,353 less than the median income in Essex County at the time. Hampshire County had 58,782 households in 2017 and a population of 161,197.
The table below shows the state's counties ranked by median annual resident earnings in 2017.