Harry Tierney (1892–1965) was an American composer and songwriter primarily known for his work in the early 20th century, particularly in the realms of popular music and musical theater. His genre primarily encompassed Tin Pan Alley and Broadway, reflecting the vibrant musical culture of his time. Tierney is best known for his collaborations with lyricist Billy Rose, producing notable songs such as "Rose of Washington Square" (1917) and "The Birth of the Blues" (1926). "The Birth of the Blues" became a significant standard, influencing the development of jazz and popular music. His work often featured catchy melodies and engaging lyrics, characteristic of the Tin Pan Alley style. Tierney's impact on music extended beyond his own compositions; his songs have been performed and recorded by various artists over the years, contributing to the American songbook. He played a crucial role in shaping the sound of early 20th-century American music, bridging the gap between vaudeville and the more sophisticated Broadway musicals that followed. Despite not being as widely recognized today, his contributions helped lay the groundwork for future developments in popular music.