Nessus may refer to:

Mythology

  • Nessus (mythology), multiple figures from Greek mythology, including:
  • Nessus (centaur), a centaur who caused the death of Heracles

Fiction

  • Nessus (Pierson's Puppeteer), an alien character in Larry Niven's Known Space books
  • Nessus, a fictional metropolis in Gene Wolfe's The Book of the New Sun
  • Nessus, a layer of Hell (Baator) in the Dungeons & Dragons tabletop game
  • Nessus, one of the moons of the fictional planet Chiron in the computer game Sid Meier's Alpha Centauri
  • Nessus, a planetoid location in the video game Destiny 2, based on the below Centaur

Science and technology

  • 7066 Nessus, a Centaur planetoid
  • Nessus (software), a computer security tool
  • Nessus (Blackberry), the proprietary kernel all Blackberry before BlackBerry 10 were based upon
  • NESSUS Probabilistic Analysis Software, a tool for assessing uncertainties in structural and mechanical systems
  • Nessus sphinx or Amphion floridensis, a moth found in North America

Other uses

  • , two vessels of the Royal Navy (UK)