| Keyword | Type | See | See also | Notes |
|---|---|---|---|---|
| Uaxactun site | Place | |||
| Ubaid period | Keyword | |||
| Ubuntu | Keyword | |||
| Ucayali river region | Place | |||
| Uchean Indians | Ethnic group | Yuchi | ||
| Uchee | Ethnic group | Yuchi | ||
| Udekama language | Keyword | Degema language | ||
| Udmurt | Ethnic group | |||
| Udmurtia | Place | Russian Federation | ||
| Uduk | Ethnic group | |||
| Uganda | Country | |||
| Ugarit site | Place | |||
| Ugaritic period | Keyword | |||
| Uhunduni | Ethnic group | |||
| Uigur | Ethnic group | |||
| Uigur language | Keyword | |||
| Uilta | Ethnic group | Orok | ||
| Uitoto | Ethnic group | Witoto | ||
| Ukraine | Country | |||
| Ukrainian | Language | |||
| Ukrainian language | Keyword | |||
| Ukrainians | Ethnic group | |||
| Ul'chi | Ethnic group | Nanai | ||
| Ullumbe site | Place | San Agustin site | ||
| Ulna | Keyword | |||
| Ultraviolet radiation | Keyword | |||
| Ulua culture | Keyword | |||
| Ulyanovsk Oblast | Place | Simbirsk Oblast | ||
| Umatilla | Ethnic group | |||
| Umayyad period | Keyword | |||
| Umbanda | Keyword | |||
| Umbilical cord | Keyword | |||
| Umbrellas and parasols | Keyword | |||
| Umbu tradition | Keyword | |||
| Umeda | Ethnic group | |||
| Umiaks | Keyword | |||
| Uncertainty | Keyword | |||
| Uncles | Keyword | |||
| Underwater archaeology | Keyword | |||
| Underworld | Keyword | |||
| Unemployed | Keyword | |||
| Unemployment | Keyword | |||
| Unesco | Keyword | |||
| Unetice culture | Keyword | |||
| Uni | Ethnic group | Cashibo | ||
| Unification | Keyword | |||
| Unification Church | Keyword | |||
| Uniformitarianism | Keyword | |||
| United Arab Emirates | Country | |||
| United Kingdom | Country |