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Richland County
County in Illinois
Richland County is a county located in the U.S. state of Illinois. According to the 2020 United States census, it had a population of 15,813. Its county seat is Olney.
Wikipedia
Cities
:
Olney
,
Noble
,
Claremont
, and
more
County seat
:
Olney
Population
:
15,435 (2022)
Congressional district
:
12th