There are 10 cities in Piatt County, Illinois.

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City
Rank
State
2024 Population
2020 Census
Annual Change
Density (mi²)
Area (mi²)
Monticello1Illinois5,9785,945-0.15%1,5553.85
Bement2Illinois1,4511,482-0.75%1,9040.76
Cerro Gordo3Illinois1,2941,315-0.69%1,7460.74
Atwood4Illinois1,0931,114-0.55%1,7660.62
Mansfield5Illinois912926-0.55%1,7990.51
Hammond6Illinois495506-0.8%6540.76
De Land7Illinois445450-0.45%1,0500.42
Cisco8Illinois254259-0.78%1,3960.18
White Heath9Illinois171153 5010.34
LaPlace10Illinois149128 2100.71
showing: 10 rows

Cities in Piatt County, Illinois by Population (2024)

What is the largest city in Piatt County, Illinois?

Monticello is the largest city in Piatt County.

What is the smallest city in Piatt County, Illinois?

LaPlace is the smallest city in Piatt County.

How many cities are in Piatt County?

There are 10 cities in Piatt County, Illinois.

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