Chinese laborers were brought in at an early date to work the Carbon County mines and railroads. By the late 1890s, Italians and Austrians (primarily Slovenians, Croatians, and Serbians) began to arrive. In 1900 Helper's population was listed at 385 people. Sixteen different nationality groups were represented. "Merchant" and "laborer" comprised most of the occupations for these early immigrants.

After the unsuccessful coal miners' strike of 1903-04, Italians, blacklisted from the mines at nearby Castle Gate, ventured into Helper to establish businesses and farms along the Price River. The influx of strikers into Helper accelerated its growth, with the newly established farms offering needed agricultural products.

The twentieth century was launched in Carbon County (which had been formed in 1894 from Emery County) in a shroud of uncertainty, largely due to the strike situation. Greek and Japanese immigrants were brought in to break the strike, and thus new ethnic groups came onto the scene. Helper, along with Price, was fast becoming the center of the Carbon County coalfields, providing service functions to the outlying camps. A 1903-04 business directory listed sixteen separate businesses in Helper; by 1912-13 the number had grown to twenty-nine, with a population of about 850. Helper townsite was regularly organized and incorporated in 1907 with a president of the town board and members of the board serving the community.