- Nolichucky River, Tennessee, United States1
- Oaks Island, Waccamaw River, Georgetown County, South Carolina, United States2
- Ohio Drainage1
- Ohio River1
- Ohio River, Louisville, Jefferson County, Kentucky, United States2
- Ohio River, Ohio, United States5
- Ohio River, United States4
- Ohio, United States22
- Oregon, United States2
- Palermo, Sicily, Italy1
- Panama1
- Paraguay1
- Pendleton, Anderson County, South Carolina, United States1
- Peru2
- Philadelphia, Philadelphia County, Pennsylvania, United States3
- Portland, Meigs County, Ohio, United States1
- Red Sea1
- Rhode Island, United States1
- Rio de Janiero, Rio de Janiero, Brazil1
- Saint James1