NK Piran (1925–98)
Nogometni klub Piran, commonly referred to as NK Piran or simply Piran, was a Slovenian football club from Piran. The club was founded in 1925. The club was dissolved during the 1997–98 Slovenian Third League season. A newly established club named NK Portorož Piran was founded in 1998. The club played their home games at Pod Obzidjem Stadium.Honours
- Slovenian Third League: 1