Vardis Fisher’s 1938 Idaho Encyclopedia lists it as a ghost town in Payette County. I’ve seen it listed as “Falk Store,” and also under the town name “Falks.”
Nathan Falk, one of the brothers who owned what became known as Falk’s Idaho Department Store, or Falk’s ID, in Boise, had a store in Payette County that snagged the local post office for the community in 1872. Falk’s Store, which would lose its possessive apostrophe under naming conventions today, was located on the Payette River between Emmett and Fruitland.
Falk’s Store was also a station for the Utah, Idaho, and Oregon Stage Line, giving it a revolving customer base. In addition to its namesake store the town had a ferry, a hotel, a saloon, a blacksmith shop, and a boot and saddle shop.
Nathan Falk’s store is said to have prospered in Falk’s Store, Idaho for several years. A 1922 fire marked the end of town. Nothing remains of it today, although there is a nearby bridge that carries the name Falk's Bridge.