Sidney Flag

Sidney

County:
Richland County
County Seat:
Yes
Area (mi²):
3.287
State:
Montana

Sidney is a city located in Richland County, Montana. Sidney has a 2026 population of 6,031. It is also the county seat of Richland County. Sidney is currently declining at a rate of -0.61% annually and its population has decreased by -5.23% since the most recent census, which recorded a population of 6,364 in 2020.

6K
Total Population
1,835
Density (mi²)
-37 -0.61%
Growth

Nearby Cities

Sources

  1. US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
  3. American Community Survey (2009 - 2013)
  4. Census QuickFacts
  5. Historical Populations of States and Counties (1790 - 1990)