| Year | Title | Chart positions |
| AUS | AUT | BEL(FL) | BEL(WA) | GER | IRE | NL | NZ | SWI | UK |
| 1967 | "Sixteen" | - | - | - | - | - | - | - | - | - | - |
| 1968 | "Come Along Murphy" | - | - | - | - | - | - | - | - | - | - |
| "Heidschi Bumbeidschi" | - | - | - | - | - | - | - | - | - | - |
| 1969 | "Look Around" | - | - | - | - | - | - | - | - | - | - |
| 1970 | "All Kinds of Everything" | 37 | 7 | 1 | 16 | 4 | 1 | 2 | - | 3 | 1 |
| "I Will Follow You" | - | - | - | - | - | - | - | - | - | - |
| 1971 | "Who Put the Lights Out" | 80 | - | - | - | - | 5 | - | - | - | 14 |
| "Today" | - | - | - | - | - | - | - | - | - | 55 |
| "Isn't It a Pity" | - | - | - | - | - | - | - | - | - | - |
| 1972 | "New Days......New Ways" | - | - | - | - | - | - | - | - | - | - |
| "Crossword Puzzle" | - | - | - | - | - | - | - | - | - | - |
| 1973 | "Do I Still Figure in Your Life" | - | - | - | - | - | - | - | - | - | - |
| "Corner of the Sky"/"Morning Glow" | - | - | - | - | - | - | - | - | - | - |
| "Sunday, Monday, Tuesday" (B-side of "Corner of the Sky/Morning Glow") | - | - | - | - | - | 4 | - | - | - | - |
| 1975 | "Please Tell Him That I Said Hello" | 99 | - | - | - | 27 | 7 | - | 18 | - | 8 |
| "Are You Still Mad at Me" | - | - | - | - | - | - | - | 37 | - | - |
| "Rivers Are for Boats" (Denmark-only release) | - | - | - | - | - | - | - | - | - | - |
| "It's Gonna Be a Cold Cold Christmas" | - | - | - | - | - | 3 | - | - | - | 4 |
| 1976 | "Never Gonna Fall in Love Again" | - | - | - | - | - | - | - | - | - | 31 |
| "Fairytale" | 99 | 19 | 2 | 37 | 21 | - | 3 | - | - | 13 |
| "It's Gonna Be a Cold Cold Christmas" (reissue) | - | - | - | - | - | 12 | - | - | - | - |
| 1977 | "I Love How You Love Me" | - | - | 11 | 44 | - | - | 27 | - | - | - |
| "Put Some Words Together" | - | - | - | - | - | - | - | - | - | - |
| 1979 | "Something's Cooking in the Kitchen" | 93 | - | - | - | - | 22 | - | - | - | 44 |
| "The Girl is Back (in Town)" | - | - | - | - | - | - | - | - | - | - |
| "I Can't Get Over Getting Over You" | - | - | - | - | - | - | - | - | - | - |
| "Totus Tuus" | - | - | - | - | - | 1 | - | - | - | - |
| 1980 | "When a Child is Born" | - | - | - | - | - | - | - | - | - | - |
| 1981 | "Lady of Knock" (Ireland-only release) | - | - | - | - | - | 23 | - | - | - | - |
| "Dream Lover" | - | - | - | - | - | 26 | - | - | - | - |
| 1982 | "I Feel Love Comin' On" | - | - | - | - | - | - | - | - | - | 66 |
| "Yer Man" (with The Northern Ireland 1982 World Cup Squad) | - | - | - | - | - | - | - | - | - | - |
| "You Never Gave Me Your Love" | - | - | - | - | - | - | - | - | - | - |
| 1983 | "If You Really Love Me" | - | - | - | - | - | - | - | - | - | - |
| 1985 | "Little Things Mean a Lot" | - | - | - | - | - | 27 | - | - | - | 92 |
| "If I Give My Heart to You" | - | - | - | - | - | 27 | - | - | - | - |
| 1986 | "Everything Is Beautiful" | - | - | - | - | - | 42 | - | - | - | - |
| "Lipstick on Your Collar" | - | - | - | - | - | - | - | - | - | - |
| 1988 | "Summer Romeo" | - | - | - | - | - | - | - | - | - | - |
| 1989 | "Harmony" (with Gerry Brown) | - | - | - | - | - | - | - | - | - | - |
| 1991 | "Creggan Vale" (Ireland-only release) | - | - | - | - | - | - | - | - | - | - |
| 2005 | "Children of the World" | - | - | - | - | - | - | - | - | - | - |
| 2019 | "Falling" | - | - | - | - | - | - | - | - | - | - |
| "-" denotes releases that did not chart. |
