Meineckia is a genus of flowering plants in the family Phyllanthaceae. It is one of eight genera in the tribe Poranthereae.  It comprises about 30 species. They are native to the Americas, South Asia, Africa, and Madagascar. The genus is particularly well represented in Madagascar. Species of Meineckia may be monoecious or dioecious. They are trees or shrubs, or rarely, they are subherbaceous.
The circumscription of Meineckia has undergone several changes since Henri Ernest Baillon erected the genus in 1858.  Some of its species have been put in other genera and sometimes other genera have been merged with it. The name Peltandra had been used for some species in Meineckia,  but this is now a nomen rejectum. The name Peltandra is now conserved as the name of a genus in Araceae. 
Meineckia was last revised in 2008 by Vorontsova and Hoffmann. They recognized 30 species and divided the genus into two subgenera. 
Meineckia subgenus Meineckia has 28 species. Its type species, Meineckia phyllanthoides, is the same as that of the genus.  They are monoecious or dioecious trees or shrubs, or sometimes, subherbaceous. Their flowers have no petals. This subgenus is the only completely apetalous taxon in the tribe Poranthereae.
Vorontsova and Hoffmann did not recognize Zimmermannia and Zimmermanniopsis as separate genera, but placed their species in Meineckia subgenus Meineckia.
- Cluytiandra Müller Argoviensis
- Neopeltandra Gamble
- Peltandra Wight
- Zimmermannia Pax
- Zimmermanniopsis Radcliffe-Smith
- Maria S. Vorontsova and Petra Hoffmann. 2008. "A phylogenetic classification of tribe Poranthereae (Phyllanthaceae)." Kew Bulletin 63(1):41-59.
- Maria S. Vorontsova, Petra Hoffmann, Olivier Maurin, and Mark W. Chase. 2007. "Phylogenetics of tribe Poranthereae (Phyllanthaceae)." American Journal of Botany 94(12):2026-2040.
- Peltandra At: International Plant Names Index (see External links below).
- Peltandra In: Index Nominum Genericorum. In: Regnum Vegetabile (see External links below).
- Meineckia At: Index Nominum Genericorum. (see External links below).