- affect
- affective individualism
- affine
- affirmative action
- affluence
- affluent worker
- age stratification
- age-sets
- ageing, sociology of
- ageism
- agency
- aggregate
- aggregate data
- aggression
- Aggression–Approval Proposition
- agnate
- agrarian capitalism
- agrarianism
- agreement, method of
- agribusiness
- agriculture, sociology of
- AIDS
- alcoholism
- alienation
- alliance theory
- Allport, Gordon W.
- altercasting
- alternative movement
- alternative technology
- Althusser, Louis
