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 363. Declo is currently growing at a rate of 1.11% annually and its population has increased by 7.08% since the most recent census, which recorded a population of 339 in 2020.

363
Total Population
1,312
Density (mi²)
4 1.11%
Growth

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)