The median income of Lafayette County residents was an inflation-adjusted $27,039 per year. Lafayette County had 13,224 households in 2017, with a population of 32,655.
The county with the highest median resident income in the state was Platte County. Platte County's median income was $38,008 per year after adjusting for inflation – $10,969 more than Lafayette County. It had 38,147 households in 2017 and a population of 96,899.
Mississippi County had the lowest annual resident income among counties in Missouri, with a median income of only $15,072 per year. That was $11,967 less than the median income in Lafayette County at the time. Mississippi County had 5,128 households in 2017 and a population of 13,916.
The table below shows the top 100 counties ranked by median annual resident earnings in 2017.