Juliaetta is a city in Latah County, Idaho, United States. The town was named after the daughters of an early settler. In 2020, Juliaetta had …Juliaetta is a city in Latah County, Idaho, United States. The town was named after the daughters of an early settler. In 2020, Juliaetta had a population of 624. Juliaetta was originally known as Schupferville, named for Rupert Schupfer who homesteaded the land in 1878. He plotted one-half of his homestead as a town site and operated the first general store. By 1878, the town had a population of 200.