The population of Clay county is estimated at 19,840. In 2017 there were 227 births and 232 deaths in Clay county. Clay county has 3,057 housing units that are owned with a mortgage or a loan, 2,501 that are owned free and clear and 2,471 that are renter occupied.

  The good residents of Clay County filed 8,320 federal tax returns in 2017. This amount represents 0.7% of all Mississippi filings and 0.006% of the entire nation. Clay had a combined total federal tax liability of $56,390,000 on earned income of $333,623,000. Other notable statistics from Clay County were 350 unemployment claims which collected a total of $891,000 and 1,550 charitable contributions valued at $10,918,000. 1,280 filings from Clay County paid a combined total of $2,573,000 in property taxes and 950 filings paid $4,760,000 on mortgage interest costs.

  In 2010 Clay county had 54 religious congregations with an estimated 11,920 members.
19.3% of the Clay population has a college level Bachelors degree or higher. 20.0% have less than a highschool diploma level education.

Approximately 50% of Clay County voted in the presidential election of 2016. This represents an increase from the 2012 election by 301 votes.
At $36,044 the median income is 82.7% of the Mississippi average. An estimated 530 people claimed to be unemployed last year in Clay, the equivalant of around 6.7% of the county population. This represents a decrease in the level of unemployment from the previous year's value of 8.1%.

Top 15 Industries in Clay County.
Total # Employed	Industry Job Type
792	Retail trade
704	Manufacturing
696	Health care and social assistance
499	Accommodation and food services
484	Fabricated metal product manufacturing
451	Food services and drinking places
434	Restaurants and other eating places
321	Transportation and warehousing
255	Other general merchandise stores
255	General merchandise stores
247	Professional, scientific, and technical services
227	Limited-service restaurants
198	Full-service restaurants
152	Food and beverage stores
136	Finance and insurance

In 2018 5.88% of listings in Clay County.

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