Conradus may refer to
- Conradus Hirsaugiensis or Conrad of Hirsau, 11th–12th German Benedictine monk and writer
- Conradus Saxo or Conrad of Saxony, also known as Conradus Holyinger, 13th-century Franciscan
- Conradus Megenbergensis or Konrad of Megenberg, 14th-century German Catholic writer and scholar
- Conradus Sapientis or Konrad Witz, 15th-century German painter
- Conradus Celtis or Conrad Celtes, 15th-16th century German humanist and poet
- Conradus Mutianus or Konrad Mutian, 15th-16th century German humanist
- Conradus Gesnerus or Conrad Gessner, 16th-century Swiss naturalist
- Conrad Dasypodius, also Conradus, Cunradus, Konrad, 16th-century Swiss mathematician
- Conradus Vorstius or Conrad Vorstius, also as Conrad or Konrad Vorst, 16th–17th century German-Dutch Protestant theologian
- Conradus Eubel or Konrad Eubel, 19th–20th century German Franciscan historian