The flora of the Chatham Islands consists of around 388 terrestrial plant species, of which 47 are endemic.^[1] The Chatham Islands make up the Chatham floristic province of the Neozeylandic Region of the Antarctic Kingdom.

The flora of the Chatham Islands include:

• Phormium chathams (Chatham Island flax)
• Myosotidium hortensia (Chatham Islands forget-me-not)
• Aciphylla dieffenbachii (soft speargrass)
• Astelia chathamica (Chatham Islands kakaha)
• Brachyglottis huntii (rautini)
• Coprosma chathamica (Chatham Islands Karamu)
• Dracophyllum arboreum (tarahinau)
• Dracophyllum scoparium (swamp heath)
• Drosera binata (fork leaved sundew)
• Embergeria grandifolia (giant sowthistle)
• Geranium traversii (Chatham Islands geranium)
• Lepidium oleraceum (Cook's scurvy grass)
• Leptinella featherstonii (button daisy)
• Linum monogynum var. chathamicum (linen flax)
• Hebe chathamica
• Hebe dieffenbachii
• Olearia chathamica (keketerehe)
• Olearia semidentata (swamp aster)
• Olearia traversiorum (Chatham Island akeake or Chatham Island tree daisy)
• Sophora chathamica (kowhai)
• Utricularia delicatula
• Veronica barkeri (tree koromiko)