The population of Stephenson county is estimated at 45,540. In 2017 there were 497 births and 553 deaths in Stephenson county. Stephenson county has 8,682 housing units that are owned with a mortgage or a loan, 5,590 that are owned free and clear and 5,573 that are renter occupied.

  The upstanding residents of Stephenson County filed 21,990 federal tax returns in 2017. This amount represents 0.4% of all Illinois filings and 0.015% of the entire nation. Stephenson had a combined total federal tax liability of $153,290,000 on earned income of $1,086,512,000. Other notable statistics from Stephenson County were 1,090 unemployment claims which collected a total of $4,785,000 and 3,570 charitable contributions valued at $15,774,000. 3,990 filings from Stephenson County paid a combined total of $17,767,000 in property taxes and 2,840 filings paid $13,450,000 on mortgage interest costs.

  In 2010 Stephenson county had 92 religious congregations with an estimated 32,580 members.
18.7% of the Stephenson population has a college level Bachelors degree or higher. 8.6% have less than a highschool diploma level education.

Approximately 43% of Stephenson County voted in the presidential election of 2016. This represents an increase from the 2012 election by 2,496 votes.
At $48,237 the median income is 76.5% of the Illinois average. An estimated 993 people claimed to be unemployed last year in Stephenson, 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 5.8%.

Top 15 Industries in Stephenson County.
Total # Employed	Industry Job Type
3,037	Manufacturing
2,545	Health care and social assistance
2,026	Retail trade
1,105	Administrative and support and waste management and remediation services
1,033	Accommodation and food services
840	Restaurants and other eating places
668	Food manufacturing
642	Other services (except public administration)
623	Ambulatory health care services
574	Nursing care facilities (skilled nursing facilities)
559	General merchandise stores
540	Services to buildings and dwellings
463	Dairy product manufacturing
463	Dairy product (except frozen) manufacturing
454	Professional, scientific, and technical services

In 2018 the average price reduction was 3.64% in Stephenson County.

In 2018 7.24% of listings in Stephenson County (averaging across 2 zip codes; 61019) dropped their price.

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