Scientists beginning with "U"
- Uhlenbeck, George Eugene — (born 6.02.1900) — an American theoretical physicist, member of the National Academy of Sciences (1955).
- Uhlmann, Armin — (born 19.02.1930) - a German theoretical physicist, member of the Academy of Sciences of the GDR (1972).
- Umov, Nikolai Alexeyevich — (4.02.1846 28.01.1915) — Russian physicist.
- Urey, Harold Clayton — (29.04.1893 — 1981) was an American physicist and physical chemist and a member of the National Academy of Sciences (1935).
- Ursu, Ioan — (born 5.04.1928) is a Romanian physicist and a member of the Romanian Academy (1974).