| Ronni Pieper | |
| Fullname: | Ronald Pieper |
| Nationality: | Swiss |
| Birth Date: | 21 March 1948 |
| Height: | 1.78m (05.84feet) |
| Classes: | Soling |
| Club: | Segelclub St. Moritz |
| Medaltemplates-Title: | Competition record |
| Show-Medals: | yes |
| Updated: | 2 March 2014 |
Ronald "Ronni" Pieper (21 March 1948 – 26 August 2007) was a sailor from Switzerland. Pieper represented his country at the 1972 Summer Olympics in Kiel. Pieper took 20th place in the Soling with Hans Gut and Peter Gerber as fellow crew members.