Knudsen

Knudsen is a surname of Scandinavian origin, derived from the personal name Knud (Canute) and literally meaning "Knud's son."

Knudsen refers to:

Persons
- Gunnar Knudsen (1848–1928), Prime Minister of Norway 1908–1910 and 1913–1920
- Jens Martin Knudsen (1930–2005), Danish astrophysicist
- Jens Martin Knudsen (1967–), Faroese goalkeeper
- Keith Knudsen (1948–2005), musician, member of The Doobie Brothers
- Knud Knudsen (linguist) (1812–1895), Norwegian linguist
- Konrad Knudsen (1890–1959), Norwegian painter, journalist, and parliamentarian
- Lars John Knudsen (1932- 2004), Australian abstract painter
- Lars Knudsen (1962–), Danish researcher in cryptography
- Martin Knudsen (1871–1949), Danish physicist, after whom is named:
  - Knudsen Gas, scientific model for gases
  - Knudsen number, dimensionless number
  - Knudsen layer, layer between liquid and vapour
- Per Holm Knudsen (contemporary), Danish author
- Semon "Bunkie" Knudsen (1912–1998), American automobile industry executive
- Valdemar Knudsen (1819–1898), Norwegian-American sugar planter on Hawaii, entrepreneur
- William S. Knudsen (1879–1948), Danish American automobile industry executive