The genus name Reussia may refer to:

  • Animalia:
    • Reussia McCoy, 1854 = synonym of Etyus Leach, 1822 (Malacostraca, Etyidae)
    • Reussia Duchassaing & Michelotti, 1860, junior homonym = synonym of Madracis Milne Edwards & Haime, 1849 (Anthozoa, Pocilloporidae)
    • Reussia Neviani, 1895, junior homonym (Bryozoa, Bryocryptellidae)
    • Reussia Maksimova, 1972, junior homonym = synonym of Reussiana Snajdr, 1987 (†Trilobita, †Dalmanitidae)
  • Plantae:
    • Reussia Endl. (1836), nom. cons. = synonym of Pontederia L (Commelinales, Pontederiaceae)
    • Reussia Dennst. (1818), nom. inval. = synonym of Paederia L (Gentianales, Rubiaceae)
    • Reussia Presl (1838), nom. rej. = synonym of †Scolopendrites (Pteridophyta, Osmundaceae)
  • Chromista:
    • Reussia Schwager, 1877 = synonym of Reussella Galloway, 1933 (Foraminifera, Reussellidae)