According to Britannica, The etymological roots of the word Hippy derives from the root word "Hip", and the closest thing we have to Hippies in the 1930's would be African Americans that were into the Jive culture, and were known as "Hip".
As might be guessed, the word hippie is derived from the word hip, which conveys being up-to-date and fashionable. This meaning of hip is thought to have originated with African Americans during the Jive Era of the 1930s and '40s.
The Hipster culture largely grew out of illegal speakeasies during the prohibition period of the 1920's that offered illicit nightclub culture and illegal alcohol, and paved the way for some of the greatest known Jazz musicians of our time.
While jazz music predated Prohibition, the new federal law restricting liquor advanced the future of jazz by creating a nationwide underground nightclub culture in the 1920s. This competitive club culture had mobsters such as Al and Ralph Capone of Chicago and Owney Madden of New York vying for the best performers for their drink-swilling customers. That culture advanced the careers of major jazz performers such as Louis Armstrong, King Oliver, Duke Ellington, Fats Waller, Paul Whiteman, Bix Beiderbecke and jazz itself as an art form. It also would lead to millions in profits for organized crime bosses.
Prohibition forced tens of thousands of saloons throughout the country to shut down, but the demand for drink remained, and thousands of illegal bars, or speakeasies, soon opened. Gangsters, who manufactured or transported liquor in violation of the federal Volstead Act, supplied the liquor, owned the speakeasies, or both. At first some speakeasy owners offered live music by bands linked to vaudeville stage acts. But jazz was a better fit for the era’s party mood. Bar owners soon were hiring small jazz bands with local players to furnish background or dance music.
Were there hippies in the USA in 1930?
Not quite, but there was an illicit Jazz culture during prohibition that would later become the sub-culture of the 1930's Hipster that would later morph into the Hippie culture of the 1960's.