Hiện hành có 40 loài được ghi nhận trong chi này.

• Poecilia boesemani Poeser, 2003
• Poecilia butleri D. S. Jordan, 1889 (Pacific molly)
• Poecilia catemaconis R. R. Miller, 1975 (Catemaco molly)
• Poecilia caucana (Steindachner, 1880) (Cauca molly)
• Poecilia caudofasciata (Regan, 1913)
• Poecilia chica R. R. Miller, 1975 (dwarf molly)
• Poecilia dauli M. K. Meyer & Radda, 2000
• Poecilia dominicensis (Evermann & H. W. Clark, 1906)
• Poecilia elegans (Trewavas, 1948) (elegant molly)
• Poecilia formosa (Girard, 1859) (Amazon molly)
• Poecilia gillii (Kner, 1863)
• Poecilia hispaniolana Rivas, 1978 (Hispaniola molly)
• Poecilia hondurensis Poeser, 2011
• Poecilia kempkesi Poeser, 2013[1]
• Poecilia koperi Poeser, 2003
• Poecilia kykesis Poeser, 2002
• Poecilia latipinna (Lesueur, 1821) (sailfin molly)
• Poecilia latipunctata Meek, 1904 (broadspotted molly)
• Poecilia marcellinoi Poeser, 1995
• Poecilia maylandi M. K. Meyer, 1983 (Balsas molly)
• Poecilia mechthildae M. K. Meyer, Etzel & Bork, 2002
• Poecilia mexicana Steindachner, 1863 (shortfin molly)
• Poecilia nicholsi (G. S. Myers, 1931)
• Poecilia obscura Schories, M. K. Meyer & Schartl, 2009
• Poecilia orri Fowler, 1943 (mangrove molly)
• Poecilia parae C. H. Eigenmann, 1894
• Poecilia petenensis Günther, 1866 (Peten molly)
• Poecilia reticulata W. K. H. Peters, 1859 (guppy)
• Poecilia rositae M. K. Meyer, K. Schneider, Radda, B. Wilde & Schartl, 2004[2]
• Poecilia salvatoris Regan, 1907 (Liberty molly)
• Poecilia sarrafae Bragança & W. J. E. M. Costa, 2011
• Poecilia sphenops Valenciennes, 1846 (black molly)
• Poecilia sulphuraria (Álvarez, 1948) (sulphur molly)
• Poecilia teresae D. W. Greenfield, 1990 (mountain molly)
• Poecilia vandepolli van Lidth de Jeude, 1887
• Poecilia velifera (Regan, 1914) (sailfin molly)
• Poecilia vivipara Bloch & J. G. Schneider, 1801
• Poecilia waiapi Bragança, W. J. E. M. Costa & Gama, 2012
• Poecilia wandae Poeser, 2003
• Poecilia wingei Poeser, Kempkes & Isbrücker, 2005 (Endler's livebearer)[3]