The median income of Yamhill County residents was an inflation-adjusted $27,000 per year. Yamhill County had 35,952 households in 2017, with a population of 102,366.
The county with the highest median resident income in the state was Clackamas County. Clackamas County's median income was $34,855 per year after adjusting for inflation – $7,855 more than Yamhill County. It had 153,822 households in 2017 and a population of 399,962.
Malheur County had the lowest annual resident income among counties in Oregon, with a median income of only $19,988 per year. That was $7,012 less than the median income in Yamhill County at the time. Malheur County had 10,262 households in 2017 and a population of 30,421.
The table below shows the state's counties ranked by median annual resident earnings in 2017.