Arco Flag

Arco

County:
Butte County
County Seat:
Yes
Area (mi²):
1.068
State:
Idaho

Arco is a city located in Butte County, Idaho. Arco has a 2026 population of 911. It is also the county seat of Butte County. Arco is currently declining at a rate of -1.19% annually but its population has increased by 3.64% since the most recent census, which recorded a population of 879 in 2020.

911
Total Population
853
Density (mi²)
-11 -1.19%
Growth

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)