| | unemployment |
| | UNESCO |
| | uneven geographic development |
| | Unión Europea |
| | union économique et monétaire |
| | Union Européenne |
| | unit root tests |
| | université |
| | university |
| | univers matriarcal |
| | unobserved component model |
| | urban area |
| | urbanisation |
| | urbanisme |
| | urbanismo |
| | urbanization |
| | urbanization process |
| | Urban mobility |
| | urban model |
| | utilisation publique |
| | utilitarism |
| | utilitarisme |
| | utopía |
| | utopia |
| | utopie |