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Facts and figures about
Warren County, Illinois
16,531
County Population
Monmouth
County Seat
542 sq mi
County area
10.25%
Warren County sales tax rate
😵💫 1 CPA for every 300 people in Illinois = high CPA charges
😓 19 million Americans missed the tax filing deadline last year
😨 30 million people miss tax deductions without expert help
😣 Almost 50% of Americans end up overpaying
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Illinois State Income Tax Rates & Brackets for 2023
The following tables represents Illinois's income tax rates and tax brackets:
SINGLE FILER
Brackets
Rates
$0+
4.95%
MARRIED FILING JOINTLY
Brackets
Rates
$0+
4.95%
Filing Status
Standard Deduction Amt.
Single
n.a.
Couple
#VALUE!
Warren county Sales Tax Rates for 2023
City
Sales Tax Rate
Tax Jurisdiction
Monmouth
10.25%
Monmouth
Avon
8%
Mcdonough
Roseville
8%
Mcdonough
Alexis
7.75%
Knox
Kirkwood
7.25%
Henderson
Cameron
7.25%
Warren
Little York
7.25%
Henderson
Gerlaw
7.25%
Warren
Berwick
7.25%
Warren
Smithshire
7.25%
Henderson
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