The genus name Sicarius may refer to:

  • Animalia:
    • Sicarius Walckenaer, 1847 (Araneae, Sicariidae): Accepted senior homonym
    • Sicarius Leidy, 1855, junior homonym (Chordata)
    • Sicarius Li, 1934, junior homonym = replaced by Lispirurus Ederli, 2017 (Nematoda, Habronematidae)