List of Billboard Hot 100 number ones of 1978

These are the Billboard Hot 100 number-one hits of 1978.

That year, 11 acts first hit number one, such as Player, Yvonne Elliman, Deniece Williams, John Travolta, The Commodores, A Taste of Honey, Exile, Nick Gilder, Anne Murray, Donna Summer, and Chic.

Johnny Mathis, previously having hit number one before creating the Hot 100, earns his first number one song on the chart.

Barry Gibb wrote or co-wrote 7 of the number one songs of the year.

An asterisk (*) by date indicates an unpublished, "frozen" week due to the special double issues that Billboard published in print at the end of the year for their year-end charts.