Sully County, County in central South Dakota, United States.
Sully County is a county in central South Dakota featuring rolling terrain and prairie landscape. The Missouri River marks its western edge and shapes the geography of the area.
The county was established in 1873 and organized in 1883. It was named after General Alfred Sully, who built Fort Sully near the Missouri River.
Agricultural traditions shape how people interact with the land and structure their lives across the region. The work of farming remains visible in the daily rhythm and landscape patterns.
The county seat of Onida is where you will find administrative services and the courthouse. The area is sparsely populated, so distances between towns can be considerable.
With sparse population density of roughly one person per square mile, this county ranks among the least populated areas in South Dakota. This remoteness defines much of the area's character.
Location: South Dakota
Inception: 1909
Capital city: Onida
Shares border with: Potter County, Hughes County, Hyde County, Stanley County, Dewey County
Website: http://sullycounty.net
GPS coordinates: 44.71000,-100.13000
Latest update: December 10, 2025 15:51
Lake Oahe
36 km
South Dakota Governor's Residence
41.9 km
South Dakota State Capitol
41.8 km
Pierre Shale
41.6 km
Fort Pierre Chouteau
41.3 km
Verendrye Site
44.1 km
Chicago and North Western Railroad Bridge
42 km
Hughes County Courthouse
41.8 km
I. W. Goodner House
40.8 km
Peter Hansen House
40.9 km
G.L. Stocker Blacksmith Shop
36.2 km
Farr House
41.5 km
Dr. William and Elizabeth Blackburn House
41.7 km
D.H. and Leah Curran House
36.3 km
Pierre Masonic Lodge
19.7 km
Brink-Wegner House
40.7 km
Sully County Courthouse
5.1 km
George Holland House
36.6 km
Potter County Courthouse
36.1 km
Karcher–Sahr House
41.6 km
L.E. Snyder House
5.2 km
John E. and Ruth Hipple House
41.7 km
Jefferson Davis Carr House
44.1 km
Crawford–Pettyjohn House
41.9 km
Horner–Hyde House
41.8 km
Methodist Episcopal Church
41.7 km
LaFramboise Island Nature Area
43.3 km
Okobojo Point Recreation Area
33.2 kmVisited this place? Tap the stars to rate it and share your experience / photos with the community! Try now! You can cancel it anytime.
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