- Rabbit Island
- Racine
- Radcliffe
- Radio City Mobile Home Park
- Rag Island
- Railroad Island
- Rake
- Raleigh
- Ralston
- Ramsey Island
- Randalia
- Randall
- Randolph
- Rands
- Rathbun
- Raymar
- Raymond
- Readlyn
- Reasnor
- Red Line
- Red Oak
- Redding
- Redfield
- Reeceville
- Reeve
- Regency Manor Mobile Home Park
- Regency of Iowa Mobile Home Park
- Regency of Sioux City
- Registry Park
- Reilly Settlement