- recency effect
- recidivist
- reciprocity
- rectangular clustering
- redemptive movement
- Redfield, Robert
- reductionism
- reference group
- referent power
- reflexive modernization
- reflexive sociology
- reflexivity
- reformative movement
- region of rejection
- Registrar General's Classification
- regression
- regulation theory
- Reich, Wilhelm
- reification
- reinforcement
- relations of production
- relative autonomy
- relative deprivation
- relative mobility
- relative poverty
- relativism
- relativism, cultural
- reliability
- religion
- religion, invisible
