The median income of Salt Lake County residents was an inflation-adjusted $30,609 per year. Salt Lake County had 363,058 households in 2017, with a population of 1,106,700.
The county with the highest median resident income in the state was Summit County. Summit County's median income was $40,823 per year after adjusting for inflation – $10,214 more than Salt Lake County. It had 14,781 households in 2017 and a population of 39,731.
Sanpete County had the lowest annual resident income among counties in Utah, with a median income of only $18,247 per year. That was $12,362 less than the median income in Salt Lake County at the time. Sanpete County had 8,366 households in 2017 and a population of 28,892.
The table below shows the state's counties ranked by median annual resident earnings in 2017.