Redlands Christian Migrant Association (RCMA)

Redneck Revolt (RR)

Reform Immigration for America (RI4A)

Reformers of Hizb-ut-Tahrir (RHUT)

Refuse & Resist! (R&R!)

Refuse Fascism (RF)

Regeneration Project (RP)

Religions For Peace (RFP)

Religions For Peace USA (RFPUSA)

Religious Freedom

Res Publica (RP)

Research & Degrowth (R&D)

Resource Center of the Americas (RCA)

Resources For the Future (RFF)

Respect — The Unity Coalition (R-TUC)

Restore Public Trust (RPT)

Rethinking Schools (RS)

Revolutionary Abolitionist Movement (RAM)

Revolutionary Communist Party (RCP)

Revolutionary Communist Youth Brigade (RCYB)

Revolutionary Council of Fatah (RCF)

Revolutionary Internationalist Movement (RIM)

Revolutionary Justice Organization (RJO)

Revolutionary Love Project (RLP)

Revolutionary Organization of Socialist Muslims (ROSM)