South Carolina Cities
- O'Neal, SC
- Oak Grove, SC
- Oak Hill, SC
- Oakdale, SC
- Oakey Bay, SC
- Oakhurst, SC
- Oakland, SC
- Oakland Crossroads, SC
- Oakley, SC
- Oakway, SC
- Oakwood, SC
- Oatland, SC
- Oats, SC
- Oceanview, SC
- Oceda, SC
- Ogden, SC
- Okatie, SC
- Olanta, SC
- Olar, SC
- Old Cordesville, SC
- Old House, SC
- Old Joe, SC
- Old Madison, SC
- Old Morrisville, SC
- Old Pickens, SC
- Old Point Station, SC
- Olin, SC
- Oliver Crossroads, SC
- Olympia, SC
- Ora, SC
- Orangeburg, SC
- Orrs, SC
- Orum, SC
- Osborn, SC
- Oswego, SC
- Otranto, SC
- Outland, SC
- Overbrook, SC
- Owdoms, SC
- Owens, SC
- Owens Crossroad, SC
- Owings, SC
- Oyster Point, SC
