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 2026 population of 375. Declo is currently growing at a rate of 1.63% annually and its population has increased by 10.62% since the most recent census, which recorded a population of 339 in 2020.

The median household income in Declo is $46,782 with a poverty rate of 14.68%. The median age in Declo is 38.1 years: 43.7 years for males, and 17.9 years for females. For every 100 females there are 84.2 males.

375
Total Population
1,355
Density (mi²)
6 1.63%
Growth

Declo Population

Declo Population

Data after 2023 is projected based on recent change

Year ↓
Population
Growth
Annual Change
202637561.63%
202536961.65%
202436341.11%
202335941.13%
202235561.72%
2021349102.95%
202033900%
201936661.67%
201836010.28%
201735930.84%
2016356-2-0.56%
201535810.28%
201435761.71%
2013351-1-0.28%
201235241.15%
201134851.46%
201034610.29%

Median Age

Overall: 38.1 years
Female: 17.9 years
Male: 43.7 years

Declo Adults

There are 282 adults, (41 of whom are seniors) in Declo.

Sex Ratio

Female: 259 (54.3%)
Male: 218 (45.7%)

Demographics

The racial composition of Declo includes 70.23% White, 7.97% other race, and smaller percentages for Native American and multiracial populations.

Population by Race

Race
Population ↓
Percentage (of total)
White33570.23%
Two or more races10321.59%
Other race387.97%
Native American10.21%
Race
Population ↓
Percentage (of total)
Two or more races7716.14%
Other race387.97%
Race
Population ↓
Percentage (of total)
White33570.23%
Two or more races265.45%
Native American10.21%

Declo Marital Status

Economics and Income Statistics

Declo 's average per capita income is $44,167. Household income levels show a median of $46,782. The poverty rate stands at 14.68%.

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$120,972-
Families$88,750$104,822
Households$46,782$74,214
Non Families$45,349$39,085

$44,167

Average Income

$46,782

Median Household Income

14.68%

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)