Declo Flag

Declo

County:
Cassia County
County Seat:
No
Area (mi²):
0.277
State:
Idaho

Declo is a city located in Cassia County, Idaho. Declo has a 2025 population of 369 . Declo is currently growing at a rate of 1.65% annually and its population has increased by 8.85% since the most recent census, which recorded a population of 339 in 2020.

The average household income in Declo is $68,633 with a poverty rate of 12.52%. The median age in Declo is 38 years: 43.3 years for males, and 29.7 years for females. For every 100 females there are 99.2 males.

369
Total Population
1,333
Density (mi²)
6 1.65%
Growth

Declo Population

Declo Population

Data after 2023 is projected based on recent change

Demographics

The racial composition of Declo includes 70.82% White, 8.37% other race, and smaller percentages for Black or African American, Native American and multiracial populations.

Population by Race

White (70.82%)

Two or more races (19.26%)

Other race (8.37%)

Black or African American (0.97%)

Native American (0.58%)

Race
Population
Percentage (of total)
White36470.82%
Two or more races9919.26%
Other race438.37%
Black or African American50.97%
Native American30.58%

Declo Marital Status

OverallMalesFemales0%10%20%30%40%50%60%70%80%90%100%

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Declo's average per capita income is $48,333. Household income levels show a median of $46,780. The poverty rate stands at 12.52%.

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$119,643-
Families$85,938$96,992
Households$46,780$68,633
Non Families$45,353$34,585

$48,333

Average Income

$46,780

Median Household Income

12.52%

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)