Clymenia may refer to:

• Clymenia (ammonite), an ammonite genus in the family Clymeniidae
• Clymenia (plant), a flowering plant genus in the family Rutaceae

• Okaba Station
• Okabayashi
• Okabayashi Shoken
• Okabe
• Okabe (disambiguation)
• Okabena Creek
• Okabe Station
• Okab sakr
• Okab Sakr
• Oka (cheese)
• Oka Cistercian Trappist Monastery
• Oka coherence theorem
• Okada Air
• Okada Airlines
• Okadaia
• Okadaiidae
• Okada masaki
• Okadanaboru
• Okadanoboru
• Okada Tokihiko
• Okadaura Station
• Oka-dera
• Okadera
• Oka-dera Temple, Asuka
• Okadidae