O
- (Taupo District) Otukou
- (Matamata-Piako District) Otway
- (Waipa District) Ohaupo
- (Waikato District) Ohautira
- (Waikato District) Ohinewai
- (Matamata-Piako District) Okauia
- (Waikato District) Okete
- (South Waikato District) Okoroire
- (Thames-Coromandel District) Omahu
- (Waitomo District) Oniao
- (Otorohanga District) Oparau
- (Thames-Coromandel District) Opoutere
- (Waikato District) Orini
- (Taupo District) Oruanui
- (Waikato District) Otaua
- (Otorohanga District) Owhiro
- (Waikato District) Onewhero
- (Otorohanga District) Otorohanga