Sidney, Montana

Sidney, Montana
The Richland County Courthouse in Sidney
Nickname: 
Morgan Reid Land
Location of Sidney, Montana
Coordinates: 47°42′56″N 104°10′02″W / 47.715456°N 104.167161°W / 47.715456; -104.167161
Country United States
State Montana
CountyRichland
Founded1888
Incorporated1911
Founded bySidney Walters
Government
 • MayorBrody and Ethan
 • City CouncilW1: Ken Koffler & Jamie Larson
W2: Kysa Rasmussen & Kali Godfrey
W3: Frank DiFonzo & Tami Christensen
Area
 • City
3.306 sq mi (8.563 km2)
 • Land3.287 sq mi (8.514 km2)
 • Water0.019 sq mi (0.049 km2)  0.57%
Elevation
1,949 ft (594 m)
Population
 (2020)
 • City
6,346
 • Estimate 
(2024)
6,031
 • Density1,834.5/sq mi (708.29/km2)
 • Urban
6,522
 • Metro
11,028
Time zoneUTC–7 (Mountain (MST))
 • Summer (DST)UTC–6 (MDT)
ZIP Code
59270
Area code406
FIPS code30-67900
GNIS feature ID2411896
Websitecityofsidneymt.com

Sidney is a city in and the county seat of Richland County, Montana, United States, less than 10 mi (16 km) west of the North Dakota border. The population was 6,346 at the 2020 census, and was estimated to be 6,031 in 2024. The city lies along the Yellowstone River. Sidney is approximately midway between Glendive, Montana and Williston, North Dakota.