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- Selma Lagerlöf, Swedish writer (1959)
- Martin Latsis, revolutionary (1988)
- Mikhail Lavrentyev, mathematician (1981)
- V E Lazarenko, clown acrobat (1989)
- Mikhail Petrovich Lazarev, Russian admiral (1987)
- Sergey Lazo, revolutionary (1948)
- Pyotr Lebedev, Russian physicist (1951)
- Valentin Lebedev, cosmonaut (1974, 1983)
- Vladimir Lebedinsky, physicist (1968)
- Vladimir Lenin, (1924–1991)
- Mikhail Lermontov, Russian writer (1941, 1957)
- Sigizmund Levanevsky, aviator (1935)
- Isaak Levitan, Russian painter (1950)
- Li Dazhao, Chinese communist (1989)
- Carl Linnaeus, Swedish naturalist (1957)
- Franz Liszt, Hungarian composer (1961)
- Fyodor Litke, Russian explorer (1947)
- Alexander Lodygin, Russian inventor (1951)
- Mikhail Lomonosov, Russian polymath (1949, 1956, 1961, 1986)
- Henry Wadsworth Longfellow, American writer (1958)
- Luigi Longo, Italian politician (1981)
- Patrice Lumumba, Prime Minister of the Republic of the Congo (1961)
- Anatoly Lunacharsky, revolutionary (1975)
- Rosa Luxemburg, German revolutionary (1957)
- Anatoly Lyadov, Russian composer (1955)
- Anatoly Lyapidevsky, aviator (1935)
- Vladimir Lyakhov, cosmonaut (1979)
Read more about this topic: List Of People On Stamps Of The Union Of Soviet Socialist Republics