Bedrift I - Rjukan
- Ifocus AS
- Intersport Rjukan
- Iversen Smøreoljeforretning
- Ingolfsland Borettslag
- Ingolfsland Borettslag
- Inva Invest AS
- Ingolfsland Næring AS
- Industriarbeiderkultur Legat for Studier
- Indisk Gatekjøkken Jyoti Kumari Jagga
- Inails Ina Jeannette Nyiri Styrvold
- ISS Service Management AS Avd Renhold Rjukan
- ISS Facility Services AS Avd Renhold Rjukan