Firma J - Gravdal
- Jusmar AS
- Jensens Service
- Juliussen Eiendom AS
- Johansens Garnservice AS
- Johansen Viggo
- Johansen Gestalt
- Josefsen Invest AS
- Jensen Guttorm
- Jensen Hildur
- Jan Edias Hansen
- John-Erik Sørensen
- Jo Bertil Sætran
- Janett Haug Larsen
- Jehovas Vitner - Gravdal Menighet
- Jan Erik Eriksen Transport
- Johansens Eiendom Raymond Johansen