Oki
- Daisen-Oki National Park
- Groovy Girls
- OKI (company)
- Ohio-Kentucky-Indiana Regional Council of Governments
- Okay
- Okhi Day
- Oki (musician)
- Oki (rapper)
- Oki (surname)
- Oki Airport
- Oki District, Shimane
- Oki Islands
- Oki Jubilee Stadium
- Oki Province
- Okie
- Open Knowledge Initiative
- Open Knowledge International
- Organisation of Islamic Cooperation
- Orkney
- Sheriff Callie's Wild West
- Super Oki
- Ōki, Fukuoka