- Uaxactún, Guatemala
- Ubaid Culture
- Uhle, Max
- uinal
- Ulfila
- ulluco
- Ulster Cycle
- ultima ratio regis
- ultra-violet visible spectrophotometry
- Umayyads
- umu ti
- unchambered long barrow
- undercroft
- understanding
- underwater archaeology
- unenclosed Bronze Age urnfield
- unenclosed settlement
- UNESCO
- Únětice Culture
- unguent flask
- unifacial flaking
- unifacial tool
- uniformitarianism
- unilinear cultural evolution
- unit
- univallate
- univallate hillfort
- unlooped socketed spearhead
- Unnefer
- Unstan ware
