| San Marino to Rosemead (California) | 4.10 mi (6.59 km) |
| San Marino to Rosemont (California) | 354.98 mi (571.28 km) |
| San Marino to Rosemount (Minnesota) | 1,516.01 mi (2,439.78 km) |
| San Marino to Rosenberg (Texas) | 1,343.16 mi (2,161.61 km) |
| San Marino to Roseville (California) | 367.21 mi (590.96 km) |
| San Marino to Roseville (Michigan) | 1,977.05 mi (3,181.76 km) |
| San Marino to Roseville (Minnesota) | 1,518.51 mi (2,443.81 km) |
| San Marino to Rossmoor (California) | 23.13 mi (37.23 km) |
| San Marino to Rossville (Maryland) | 2,312.90 mi (3,722.26 km) |
| San Marino to Roswell (Georgia) | 1,923.10 mi (3,094.94 km) |
| San Marino to Roswell (New Mexico) | 781.53 mi (1,257.76 km) |
| San Marino to Round Lake (Illinois) | 1,714.16 mi (2,758.67 km) |
| San Marino to Round Lake Beach (Illinois) | 1,715.81 mi (2,761.33 km) |
| San Marino to Round Rock (Texas) | 1,217.29 mi (1,959.04 km) |
| San Marino to Rowland Heights (California) | 16.43 mi (26.45 km) |
