A lead single is usually the first single released by a musician or a band before the release of its home album.

During the era of the grammophone record, all music arrived in the marketplace as what is now termed a single, one potential hit song backed by an additional song of generally less commercial appeal on a single ten-inch 78 RPM shellac record. After the launch of the long-playing microgroove record in 1948 and the arrival of the 45rpm single the following year, singles continued to appear separately from albums into the 1960s. For instance, the early rock and roll market of the 1950s and early 1960s was very much focused on singles rather than albums. Songs such as "Heartbreak Hotel", "Johnny B. Goode", and "Tutti Frutti" only appeared later on album compilations of singles. Even through the 1960s, leading rock artists such as The Beatles, The Beach Boys, Bob Dylan, and The Rolling Stones issued songs such as "Strawberry Fields Forever", "Penny Lane," "Good Vibrations", "Positively 4th Street", and "Honky Tonk Women" as singles apart from any contemporary albums.