| Abbreviation | Definition |
|---|---|
| RSCC | Republican Study Committee of Colorado |
| RSDLP | Russian Social-Democratic Labor Party |
| RSDR | Religion Spirituality and Democratic Renewal |
| RSF | Republican SINN |
| RSF | Republican SINN FÉIN |
| RSFSR | Russian Soviet Federative Socialist Republic |
| RSLP | Revolutionary Socialist Labor Party |
| RSML | Republican Scientific Medical Library |
| RSP | Revolutionary Socialist Party |
| RSS | Rashtriya Swayamsevak Sangh |
| RSSC | Republican Secretaries of State Committee |
| RSSC | Republican Seismic Survey Center |
| RSYC | Red Star Youth Collective (political group) |
| RTAA | Real Truth About Abortions |
| RTAB | Right To Arm Bears |
| RTCI | Rural Transportation Coalition Initiative |
| RTE | Recep Tayyip Erdogan |
| RTPA | Reform The Patriot Act |
| RTV | Rock The Vote |
| RV | Received Votes |