Idaho · United States
Arco population
857people · latest figure
Arco has a population of 857, making it the 8625th largest place we list in United States. It is in Idaho.
Arco holds under a tenth of one per cent of United States's 349,035,494 people. New York City, the largest place we list there, is 10273 times its size. Twenty years earlier the World Gazetteer recorded 1,010, a fall of 15%.
The 2005 figure comes from the World Gazetteer archive restored on this site. The two sources may draw the settlement's boundary differently, so treat the change as indicative rather than exact. Why figures differ.
Arco is in Idaho, which has 135 recorded places.
Nearby in size
| Place | Region | Population |
|---|---|---|
| Dagsboro | Delaware | 859 |
| Elsinore | Utah | 857 |
| Tatum | New Mexico | 857 |
| Gallatin Gateway | Montana | 856 |
| Virginia City | Nevada | 855 |
| Buffalo Soapstone | Alaska | 855 |
All places in United States → · Idaho →
Figures are the latest available in GeoNames (CC BY 4.0), which draws on national censuses of varying dates — treat them as recent, not same-year. Country totals are UN World Population Prospects 2024 (medium variant) where the UN lists the country separately; the handful it reports under a parent state keep a GeoNames figure and are marked as such. Sources & method.