The population of Marion county is estimated at 38,066. In 2017 there were 483 births and 409 deaths in Marion county. Marion county has 6,632 housing units that are owned with a mortgage or a loan, 5,343 that are owned free and clear and 4,173 that are renter occupied.

  The residents of Marion County filed 17,490 federal tax returns in 2017. This amount represents 0.3% of all Illinois filings and 0.012% of the entire nation. Marion had a combined total federal tax liability of $113,984,000 on earned income of $806,237,000. Other notable statistics from Marion County were 920 unemployment claims which collected a total of $4,420,000 and 1,710 charitable contributions valued at $9,904,000. 2,130 filings from Marion County paid a combined total of $6,980,000 in property taxes and 1,580 filings paid $7,372,000 on mortgage interest costs.

  In 2010 Marion county had 115 religious congregations with an estimated 24,406 members.
15.2% of the Marion population has a college level Bachelors degree or higher. 11.1% have less than a highschool diploma level education.

Approximately 44% of Marion County voted in the presidential election of 2016. This represents an increase from the 2012 election by 872 votes.
At $45,126 the median income is 71.6% of the Illinois average. An estimated 907 people claimed to be unemployed last year in Marion, the equivalant of around 5.1% of the county population. This represents a decrease in the level of unemployment from the previous year's value of 6.3%.

Top 15 Industries in Marion County.
Total # Employed	Industry Job Type
3,009	Health care and social assistance
2,567	Manufacturing
1,349	Retail trade
981	Nursing and residential care facilities
848	Accommodation and food services
794	Food services and drinking places
741	Restaurants and other eating places
461	Transportation and warehousing
450	Limited-service restaurants
446	Ambulatory health care services
373	Finance and insurance
353	Machinery manufacturing
336	Wholesale trade
312	General merchandise stores
312	Other general merchandise stores

In 2018 10.74% of listings in Marion County.

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