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- Ugadugaru, Mopti, Mali
- Ugaiushak Island, Alaska, USA
- Uganda
- Ugashik, Alaska, USA
- Ugashik, Bristol Bay, Lake And Peninsula, Alaska, USA
- Ugava Bay, Quebec, Canada
- Ugutu, New Georgia, Solomon Islands
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- Uiaku, Oro, Papua New Guinea
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- Unalakleet, Alaska, USA
- Unalaska, Alaska, USA
- Unalaska, Aleutian Islands, Alaska, USA
- Unalaska, Unalaska Island, Alaska, USA
- Unalaska, Unalaska Island, Aleutian Islands, Alaska, USA
- Unalaska Island, Alaska, USA
- Unalaska Island, Aleutian Islands, Alaska, USA
- Unalaska Island, Fox Islands, Aleutian Islands, Aleutians West, Alaska state, USA
- Underwood Community, possibly, USA
- Ungava Bay, Canada
- Ungava Bay, Labrador, Canada
- Ungava peninsula, Québec province, Canada
- Unidentified, Saudi Arabia
- Union Bar, British Columbia, Canada
- Union Bar Site, British Columbia, Canada
- Union Bay, British Columbia, Canada
- United Kingdom
- Unknown, Peru
- Unknown State, USA
Up
- Upernivik, Greenland
- Upolu, Samoa
- Upper, Ntlak.Apamux, Ntlakyapamux, British Columbia, Canada
- Upper Auke, Juneau Borough, Alaska, USA
- Upper Auke Vicinity, Juneau Borough, Alaska, USA
- Upper Canada, Canada
- Upper Chilkat River, Haines Borough, Alaska, USA
- Upper Colville River, Icy Cape, North Slope Borough, Alaska, USA
- Upper Colville River, North Slope Borough, Alaska, USA
- Upper Harrison River, British Columbia, Canada
- Upper Ica Valley, Peru
- Upper Ica Valley Peru, Peru
- Upper Kuskokwim, Alaska, USA
- Upper Lake, California, USA
- Upper Missouri, Missouri, USA
- Upper Missouri, USA
- Upper Sachutue River, Cook Inlet, Kenai Peninsula Borough, Alaska, USA
- Upper Sardis Reserve, Sardis, British Columbia, Canada
- Upper Skeena, British Columbia, Canada
- Upper Skeena River, Alaska, USA
- Upper Skeena River, British Columbia, Canada
- Upper Stikine River, Alaska, USA
- Upper Tanana River, Alaska, USA
- Upper Tanana River, Nabesna, Alaska, USA
- Upper Tanana River Alaska, USA
- Upper Vaupes, Colombia
- Upper Yukon River, Alaska, USA
- Upper Yukon Valley, Alaska, USA
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- Ur, Iraq
- Uray' irah 1, Saudi Arabia
- Uray' irah 11a, Saudi Arabia
- Uray' irah 11b, Saudi Arabia
- Uray' irah 11b2, Saudi Arabia
- Uray' irah 11c, Saudi Arabia
- Uray' irah 11d, Saudi Arabia
- Uray' irah 14, Saudi Arabia
- Uray' irah 14n, Saudi Arabia
- Uray' irah 15, Saudi Arabia
- Uray' irah 16, Saudi Arabia
- Uray' irah 18, Saudi Arabia
- Uray' irah 19, Saudi Arabia
- Uray' irah 2, Saudi Arabia
- Uray' irah 20, Saudi Arabia
- Uray' irah 2n, Saudi Arabia
- Uray' irah 4, Saudi Arabia
- Uray' irah 5a, Saudi Arabia
- Uray' irah 5b, Saudi Arabia
- Uray' irah 5c, Saudi Arabia
- Uray' irah 5cn, Saudi Arabia
- Uray' irah 5d, Saudi Arabia
- Uray' irah 6, Saudi Arabia
- Uray' irah 8, Saudi Arabia
- Urbino, Marches, Italy
- Urubamba, Peru
- Uruk, Iraq
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