Ohakune Club Inc
- 71 Goldfinch Street, Ohakune
Omaha Bay Vineyard
- 189 Takatu Rd, Matakana
Ohau School
- 13 Muhunoa East Road, Ohau, Levin
Omakau Commercial Hotel
- 1 Harvey Street, Omakau
Ohaupo School
- Great South Road, R D 1, Ohaupo
Office of the Ombudsmen
- Level 10, Forsyth Barr Tower, 55-65 Shortland Street, Auckland
The Oaks Senior Care Centre
- 88 Main South Rd, Christchurch
Oikoumene Forest Ltd
- 197 Wishart Road, RD 2, Helensville, Auckland
PHR Processing Ltd
- 4 Seafair Close, Cloudy Bay Business Park, Blenheim
Oceania Meat Processors Ltd
- 269 Stafford Street, Timaru