Atomic City is an unincorporated area in Bingham County, Idaho, United States.

[5] Atomic City was called "Midway" until 1950, as it is halfway between the towns of Blackfoot and Arco (home of Experimental Breeder Reactor I, the world's first electricity-generating nuclear power plant).

Atomic City disincorporated after residents approved through an election in 2020.

According to the United States Census Bureau, the city has a total area of 0.11 square miles (0.28 km2), all of it land.

[6] Atomic City is just south of the Idaho National Laboratory site, on U.S. Route 26.

[7] At the 2010 census there were 29 people in 17 households, including 9 families, in the city.

The racial makeup of the city was 96.6% White and 3.4% Native American.