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 2025 population of 5,945. It is also the county seat of Richland County. Sidney is currently declining at a rate of -1.38% annually and its population has decreased by -6.55% since the most recent census, which recorded a population of 6,362 in 2020.

The average household income in Sidney is $97,588 with a poverty rate of 8.63%. The median age in Sidney is 38.9 years: 39.2 years for males, and 38.6 years for females.

Demographics

The racial composition of Sidney includes 86.13% White, 3.9% other race, and smaller percentages for Native Hawaiian or Pacific Islander, Native American, Asian, Black or African American and multiracial populations.

Population by Race

White

Two or more races

Other race

Native Hawaiian or Pacific Islander

Native American

Asian

Black or African American

Race	Population	Percentage (of total)
White	5,370	86.13%
Two or more races	494	7.92%
Other race	243	3.9%
Native Hawaiian or Pacific Islander	98	1.57%
Native American	19	0.3%
Asian	11	0.18%
Black or African American	0	0%

Sidney Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Sidney's average per capita income is $47,681. Household income levels show a median of $62,992. The poverty rate stands at 8.63%.

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	$108,470	-
Families	$86,544	$120,511
Households	$62,992	$97,588
Non Families	$36,682	$62,669

$47,681

Average Income

$62,992

Median Household Income

8.63%

Poverty Rate