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 364. Declo is currently growing at a rate of 1.39% annually and its population has increased by 7.69% since the most recent census, which recorded a population of 338 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.

364
Total Population
1,315
Density (mi²)
5 1.39%
Growth

Declo Population

Demographics

Economics and Income Statistics

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)