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Piatt County is a county in Illinois. According to the 2020 United States census, it had a population of 16,673. Its county seat is Monticello. Piatt County is part of the Champaign-Urbana Metropolitan Area.
Country:
United States
State:
Illinois
Founded:
1841
Named after:
James A. Piatt
Seat:
Monticello
Largest city:
Monticello
Congressional districts:
13th, 15th
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Data from:
en.wikipedia.org