The town of Harmony began as a dairy settlement in the late 19th century started by Swiss immigrants living near the Italian border.

As the town grew, it soon hosted a dairy management office, dormitories for employees, a livery stable, a blacksmith, and later a gas station.

At its peak, the creamery employed 10 workers, producing high quality dairy products, including butter and cheese that gave Harmony name recognition statewide.

Ken Minyard and Bob Arthur were the hosts and featured artist Jehry Miller singing his hit song "Harmonizing in Harmony Population 18".

Jehry Miller, along with producer Stephen G. Scott of Los Angeles, also wrote the Ken and Bob Company theme song.

A small cadre of artisans keeps Harmony alive, with retail shops selling art objects, locally hand blown glass, and pottery, but the town faces an uncertain future.

Harmony has a mild, maritime-influenced Mediterranean climate with rainy winters, dry summers, and little seasonal temperature variation.

In the 4th episode of the HLN Kids Network's Gerbda, Harmony is mentioned on a list of tourist destinations read by Buster, a character played by Matt Walsh.