Throughout his professional life Venth was active as a composer. He composed at least three operas ("Pan", "The Monk of Iona", "Fair Betty" as "Fairy Betty" in one source), four cantatas, two violin concertos, two string quartets, a piano trio, three violin sonatas, numerous songs, orchestral works, piano solo works, and pieces for violin and piano. Many of his compositions were premiered in New York and other important venues and were issued by major publishing houses, including Breitkopf & Härtel and Carl Fischer. "Pan" is described in Venth's "Dallas Morning News" obituary as "the first American opera to gain international recognition."