The population of Polk county is estimated at 16,770. In 2017 there were 164 births and 214 deaths in Polk county. Polk county has 2,550 housing units that are owned with a mortgage or a loan, 2,722 that are owned free and clear and 1,381 that are renter occupied.

  The upstanding residents of Polk County filed 7,040 federal tax returns in 2017. This amount represents 0.2% of all Tennessee filings and 0.005% of the entire nation. Polk had a combined total federal tax liability of $40,809,000 on earned income of $308,336,000. Other notable statistics from Polk County were 320 unemployment claims which collected a total of $757,000 and 640 charitable contributions valued at $4,018,000. 760 filings from Polk County paid a combined total of $1,377,000 in property taxes and 610 filings paid $4,337,000 on mortgage interest costs.

  In 2010 Polk county had 60 religious congregations with an estimated 11,492 members.
10.8% of the Polk population has a college level Bachelors degree or higher. 19.5% have less than a highschool diploma level education.

About 39% of Polk County voted in the presidential election of 2016. This represents an increase from the 2012 election by 461 votes.
At $41,191 the median income is 80.3% of the Tennessee average. An estimated 336 people claimed to be unemployed last year in Polk, the equivalant of around 4.6% of the county population. This represents a decrease in the level of unemployment from the previous year's value of 5.7%.

Top 15 Industries in Polk County.
Total # Employed	Industry Job Type
395	Health care and social assistance
370	Retail trade
296	Accommodation and food services
249	Restaurants and other eating places
173	Amusement, gambling, and recreation industries
173	Other amusement and recreation industries
173	Arts, entertainment, and recreation
156	Full-service restaurants
108	Manufacturing
93	Limited-service restaurants
86	Food and beverage stores
82	Grocery stores
58	Other general merchandise stores
58	All other general merchandise stores
58	General merchandise stores

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