Conductor or conduction may refer to:

• Conductor (music), a person who leads a musical ensemble
• Conductor (album), by The Comas
• Conduction, musical improvisation method of Butch Morris

• Conductor (ring theory)
• Conductor of an abelian variety
• Conductor of a Dirichlet character
• Conductor (class field theory)
• Artin conductor, of a Galois group
• Conductor of a Numerical semigroup

• Electrical conductor
  • Electrical resistivity and conductivity
  • Electrical resistance and conductance
  • Fast-ion conductor
  • Mixed conductor, ionic and electronic
  • Electrical conduction system of the heart
• Thermal conduction
  • Thermal conductivity

• Bus conductor, checking tickets
• Conductor (rail), on a train
• Conductor (underground railroad), freeing slaves

• Mr. Conductor, a character in Shining Time Station and Thomas and the Magic Railroad
• Conductor (architecture), a downspout
• Conductor (company), search engine optimisation company, New York City, US
• Conductor (military appointment), UK warrant officer
• Conductor (software), microservice orchestration
• The Conductor (film), by Pavel Lungin, Russia, 2012
• Part of the palpal bulb of male spiders
• The Orchestra Conductor, a 1980 Polish film by Andrzej Wajda
• Teacher in conductive pedagogy