| Eleocharis bonariensis Nees, 1840 |
| Eleocharis brachycarpa Svenson, 1929 |
| Eleocharis calyptrata (Liebm.) Steud., 1855 |
| Eleocharis cancellata S. Watson, 1883 |
| Eleocharis capitata (L.) R. Br., 1810 |
| Eleocharis caribaea (Rottb.) S.F. Blake, 1918 |
| Eleocharis cellulosa Torr., 1836 |
| Eleocharis coloradoensis (Britton) Gilly, 1941 |
| Eleocharis constricta Schult., 1824 |
| Eleocharis costaricensis Boeckeler, 1896 |
| Eleocharis crassiculmis (Nees) Steud., 1855 |
| Eleocharis cryptica Saarela, P.M. Peterson, S. González & D.J. Rosen, 2010 |
| Eleocharis cyperina (Willd.) Roem. & Schult., 1817 |
| Eleocharis densa Benth., 1840 |
| Eleocharis depauperata (Vahl) Kunth, 1837 |
| Eleocharis disciformis Parish, 1904 |
| Eleocharis dombeyana Kunth, 1837 |
| Eleocharis durandii Boeckeler, 1896 |
| Eleocharis elata Boeckeler, 1872 |
| Eleocharis elegans (Kunth) Roem. & Schult., 1817 |