- race
- racialism
- racialization
- racism, institutional
- Radcliffe-Brown, Alfred Reginald
- radical criminology
- random sample
- random sampling error
- range
- rank-order equality
- ranking
- rating
- ratio measurement
- rational choice theory
- rational state
- rational-systems theory
- rationalism
- rationality
- rationality, formal
- rationality, functional
- rationality, substantive
- rationalization
- Ratzenhofer, Gustav
- re-study
- reaction formation
- reactive depression
- real socialism
- realism
- realist criminology
- rebellion
