There are 14 cities in Washington County, Illinois.

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City
Rank
State
2024 Population
2020 Census
Annual Change
Density (mi²)
Area (mi²)
Centralia1Illinois11,65112,151-1.19%1,4238.19
Nashville2Illinois3,0123,092-0.56%9783.08
Okawville3Illinois1,3511,367-0.22%6672.02
Wamac4Illinois961984-0.62%6841.41
Irvington5Illinois571582-0.35%5651.01
Hoyleton6Illinois510520-0.2%6710.76
Ashley7Illinois449459-0.44%3981.13
Addieville8Illinois2622580.77%2640.99
Richview9Illinois231236-0.43%2011.15
Oakdale10Illinois1991970.51%1261.58
Du Bois11Illinois1941802.65%1841.05
Radom12Illinois1851830.54%1771.05
New Minden13Illinois164166 5920.28
Venedy14Illinois122126-0.81%4340.28
showing: 14 rows

Cities in Washington County, Illinois by Population (2024)

What is the largest city in Washington County, Illinois?

Centralia is the largest city in Washington County.

What is the smallest city in Washington County, Illinois?

Venedy is the smallest city in Washington County.

How many cities are in Washington County?

There are 14 cities in Washington County, Illinois.

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