| Year: | 1981 |
| Broadcaster: | Swiss Broadcasting Corporation (SRG SSR) |
| Country: | Switzerland |
| Preselection: | French: Concours Eurovision 1981 |
| Preselection Date: | 21 February 1981 |
| Entrant: | Peter, Sue and Marc |
| Song: | Italian: Io senza te|i=no |
| Final Result: | 4th, 121 points |
Switzerland was represented at the Eurovision Song Contest 1981 with the song "Italian: Io senza te|i=no", written by Peter Reber and Nella Martinetti, and performed by Peter, Sue and Marc. The Swiss participating broadcaster, the Swiss Broadcasting Corporation (SRG SSR), selected its entry for the contest through a national final. Peter, Sue, and Marc had already represented Switzerland,, and contests.
Swiss French broadcaster French: [[Télévision Suisse Romande]]|i=no (TSR) was in charge of staging and broadcasting the selection for the Swiss entry for the Eurovision Song Contest 1981. The final was held at the Geneva Palladium in Geneva, hosted by Jean-Pierre Pastori. Six songs were submitted for the 1981 national final and the winning song was chosen by 3 regional juries (DRS, TSR, TSI), plus a press jury and a jury of experts.
Other participants included future Swiss representative Mariella Farré (1983 and 1985)
| Draw | Artist | Song | Regional Juries | Press Jury | Expert Jury | Total | Place | |||
|---|---|---|---|---|---|---|---|---|---|---|
| DRS | TSR | TSI | ||||||||
| 1 | Peter, Sue and Marc | "Io senza te" | 4 | 5 | 7 | 7 | 7 | 30 | 1 | |
| 2 | Rose Brown | "Du fehlst mir" | 3 | 2 | 3 | 1 | 4 | 13 | 5 | |
| 3 | Pascal Auberson | "Comme l'eau de la mer" | 2 | 4 | 2 | 3 | 5 | 16 | 4 | |
| 4 | Ireen Indra | "Io" | 5 | 4 | 5 | 4 | 3 | 21 | 3 | |
| 5 | Swiss Union | "San Gottardo" | 7 | 7 | 4 | 5 | 2 | 25 | 2 | |
| 6 | Mariella Farré | "Una cosa meravigliosa" | 1 | 1 | 1 | 2 | 1 | 6 | 6 | |
On the night of the contest the group performed nineteenth, following and preceding . At the close of voting "Italian: Io senza te|i=no" picked up 121 points, placing Switzerland in fourth place out of 20.[1] It was the seventh consecutive year that Switzerland had finished in the top 10. The Swiss jury awarded its 12 points to .
The Swiss conductor at the contest was Rolf Zuckowski.