There are 2 cities in Sully County, South Dakota.

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City
Rank
State
2024 Population
2020 Census
Annual Change
Density (mi²)
Area (mi²)
Onida1South Dakota625665-2.19%9300.67
Agar2South Dakota72671.41%3510.20
showing: 2 rows

Cities in Sully County, South Dakota by Population (2024)

What is the largest city in Sully County, South Dakota?

Onida is the largest city in Sully County.

What is the smallest city in Sully County, South Dakota?

Agar is the smallest city in Sully County.

How many cities are in Sully County?

There are 2 cities in Sully County, South Dakota.

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