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 5,864. It is also the county seat of Richland County. Sidney is currently declining at a rate of -1.4% annually and its population has decreased by -7.86% since the most recent census, which recorded a population of 6,364 in 2020.

The median household income in Sidney is $62,538 with a poverty rate of 7.7%. The median age in Sidney is 37.3 years: 37.1 years for males, and 37.3 years for females. For every 100 females there are 95.1 males.

5.9K
Total Population
1,784
Density (mi²)
-83 -1.4%
Growth

Sidney Population

Sidney Population

Data after 2023 is projected based on recent change

Year ↓
Population
Growth
Annual Change
20265,864-83-1.4%
20255,947-84-1.39%
20246,031-37-0.61%
20236,068-74-1.2%
20226,142-95-1.52%
20216,237-108-1.7%
20206,3641091.74%
20196,255-18-0.29%
20186,273-94-1.48%
20176,367-202-3.08%
20166,569-273-3.99%
20156,8423385.2%
20146,5042013.19%
20136,3032944.89%
20126,0094297.69%
20115,5802494.67%
20105,3311402.7%
20004,774-443-8.49%
19905,217-509-8.89%
19805,7261,18326.04%
19704,543-21-0.46%
19604,56457714.47%
19503,9871,00933.88%
19402,97800%

Median Age

Overall: 37.3 years
Female: 37.3 years
Male: 37.1 years

Sidney Adults

There are 4,609 adults, (838 of whom are seniors) in Sidney.

Sex Ratio

Female: 3,163 (51.3%)
Male: 3,008 (48.7%)

Demographics

The racial composition of Sidney includes 86.21% White, 3.06% other race, and smaller percentages for Native Hawaiian or Pacific Islander, Asian, Native American and multiracial populations.

Population by Race

Race
Population ↓
Percentage (of total)
White5,32086.21%
Two or more races5809.4%
Other race1893.06%
Native Hawaiian or Pacific Islander610.99%
Asian140.23%
Native American70.11%
Race
Population ↓
Percentage (of total)
Other race1893.06%
Two or more races1592.58%
White1482.4%
Race
Population ↓
Percentage (of total)
White5,17283.81%
Two or more races4216.82%
Native Hawaiian or Pacific Islander610.99%
Asian140.23%
Native American70.11%

Sidney Marital Status

Economics and Income Statistics

Sidney 's average per capita income is $47,469. Household income levels show a median of $62,538. The poverty rate stands at 7.7%.

Families: A family includes the owner or renter of the home along with everyone related to them - whether through birth, marriage, or adoption. This includes relatives like spouses, children, parents, siblings, grandparents, and any other family members.
Households: A household includes all the people who occupy a housing unit (such as a house or apartment) as their usual place of residence.
Non Families: A nonfamily household is either someone living alone or when the owner/renter lives with people they aren't related to, like roommates.
Name
Median ↓
Mean
Married Families$106,713-
Families$74,898$130,817
Households$62,538$110,270
Non Families$50,139$80,590

$47,469

Average Income

$62,538

Median Household Income

7.7%

Poverty Rate

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)