Cities in Switzerland ( 586 )
- Oberrieden
- Oberriet
- Oberrohrdorf
- Obersiggenthal
- Oberuzwil
- Oberwil
- Oberwinterthur (Kreis 2)
- Obfelden
- Oensingen
- Oetwil am See
- Oftringen
- Ollon
- Olten
- Onex
- Orbe
- Orsières
- Payerne
- Peseux
- Pfäffikon
- Pieterlen
- Plan-les-Ouates
- Porrentruy
- Port-Valais
- Poschiavo
- Prangins
- Pratteln
- Pregassona
- Préverenges
- Prilly
- Pully
- Quarten
- Rafz
- Randogne
- Rapperswil
- Rebstein
- Regensdorf