- Radnor Green
- Ragged Island
- Raintree Village
- Ralphs
- Ramble Woods
- Rambleton Acres
- Ravenwood
- Rawley Island
- Records Estates
- Red Hill Manor
- Red Lion
- Red Mill Farms
- Redden
- Redden Crossroads
- Reedy Island
- Reedy Island
- Reeves Crossing
- Rehak
- Rehoboth Beach
- Rehoboth Manor
- Rehoboth Shores Mobile Home Park
- Reybold
- Reynard Crossing
- Reynolds Mill
- Richard Heights
- Richardson Estates
- Richardson Park
- Ricland Heights
- Ridgewood
- Ridgewood Manor