page_title: Mount Carroll, Illinois
section_title: History
hierarchical_section_title: Mount Carroll, Illinois / History
caption_attribution_description: English: The Carroll County Courthouse in Mount Carroll, Illinois, constructed 1895.
context_page_description: Mount Carroll is a city in Carroll County, Illinois, United States. It is the Carroll County seat. The population was 1,717 at the 2010 census and as of 2018, the population had changed to an estimated 1,587.
  Due to its elevation and northwesterly location, Mount Carroll is subject to unusually cold winter weather. From 1930 to 1999, Mount Carroll held the record for the lowest temperature ever recorded in Illinois, −35 °F, recorded on January 22, 1930. The record was beaten by Congerville in 1999, by one degree Fahrenheit. 20 years later, on January 31, 2019 during an extreme cold snap, Mount Carroll regained the title of coldest city in Illinois when a new Illinois state record low temperature of −38 °F was officially recorded.
context_section_description: Mount Carroll began life as a mill town around 1841. In 1843, a referendum moved the county seat from nearby Savanna to Mount Carroll. The town was incorporated in 1855 and became a city in 1867; the first mayor was Nathaniel Halderman, a prominent local businessman and co-founder of the mill.
  Shimer College was established in Mt. Carroll in 1853, but mounting debts forced a move to Waukegan in 1979 and subsequently to Chicago in 2006.  The campus now is home to several organizations, most notably the Campbell Center for Historic Preservation Studies.
  Political scientist Robert Keohane grew up in Mt. Carroll before attending Shimer.
caption: Carroll County Courthouse
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