| Rangeland Resources & Wildland Soils (See Forestry, Fire & Rangeland Management) | | | |
| Recreation & Wellness Center | | 826-3357 | 826-3354 |
| Recreation Administration | KA 305 | 826-4536 | 826-5451 |
| Recreation Center, Student | | 826-4197 | |
| Recreational Sports | RWC 101 | 826-6011 | |
| Recycling Program, Campus: See Waste Reduction & Resources Awareness Program | Warren House | 826-4162 | |
| Redwood Area Math Project | Jensen House | 826-5028 | 826-5099 |
| Redwood Science Project | Science A room 358 | 826-5552 | |
| Redwood Writing Project | Founders Hall 201 | 826-5109 | 826-5939 |
| Registrar, Office of the | Student & Business Services 133 | 826-4101 | 826-6194 |
| Representing Realities | SBS 305 | 826-5946 | |
| Report a Concerning Behavior | Siemens Hall 212 | 826-3387 | |
| Research & Creative Activities | Siemens Hall 213D | 826-5481 | 826-3939 |
| Research & Sponsored Programs, Office of (ORSP) | SBS 427 | 826-4189 | 826-4783 |
| Residency for Tuition Purposes; Admissions | Student & Business Services, 1st Floor | 826-4402 | |
| ResNet Help Desk | | 826-5532 | |
| Retention through Academic Mentoring Program(RAMP) | Library 25 | 826-4585 | |
| Reusable Office Supply Exchange (ROSE) | Warren House, room 102 | 826-4162 | |
| Rising Tides | SBS 305 | 826-5946 | |
| River Institute | | | |
| Robotics Camp | | 826-6226 | |
| Room Reservations - Conference & Event Services | | 826-5981 | |
