- North Atlantic Ocean 1
- North Carolina, United States1
- Oak Grove School, Williamston, Anderson County, South Carolina, United States1
- Ohio1
- Oklahoma City, Oklahoma County, Oklahoma, United States1
- Orange (N.J.)1
- Orange Parish (S.C.)1
- Orangeburg County (S.C.); Aiken County (S.C.)1
- Orangeburg, SC1
- Orangeburg, South Carolina 1
- Pacific Islands1
- Panama Park (Fla.)1
- Paramus, Bergen County, New Jersey, United States1
- Paris1
- Parris Island (S.C.: Recruit depot)1
- Pauline (S.C.)1
- Pawleys Island (S.C.)1
- Pearl Harbor (Hawaii)1
- Pecos (Tex.)1
- Peleliu, Paulau1