Tongue orchid or tongue-orchid is a common name for several plants and may refer to:
- Bulbophyllum fletcherianum
- Dendrobium linguiforme
- Serapias, genus of tongue-orchids
- Serapias lingua, Tongue-orchid
- Serapias cordigera, Heart-flowered tongue-orchid
- Serapias neglecta, Scarce tongue-orchid
- Serapias parviflora, Small-flowered tongue-orchid
- Cryptostylis, genus
- Cryptostylis leptochila, Small tongue-orchid
- Cryptostylis subulata, Large tongue-orchid
- Cryptostylis hunteriana, Leafless tongue-orchid
- Cryptostylis erecta, Tartan tongue-orchid