Thir - tran
- Third World
- Third World entrepôt
- Thomas
- Thomas Theorem
- Thomas, Dorothy Swaine
- Thomas, William Isaac
- Thurstone scale
- time, sociological study of
- time-and-motion studies
- time-budget studies
- time-orientation
- time-series data
- Titmuss, Richard Morris
- Tocqueville
- Tocqueville, Alexis de
- Tönnies
- Tönnies, Ferdinand
- total institution
- total war
- totalitarian
