List of number-one singles of 1977 (Ireland)

This is a list of singles which have reached number one on the Irish Singles Chart in 1977.


 * 24 Number Ones
 * Most weeks at No.1 (artist): ABBA (5)
 * Most weeks at No.1 (song): "Knowing Me, Knowing You" - ABBA (5)
 * Most No.1s: all artists 1 Number One each