Hair grass is a common name for several plants and can refer to:
Agrostis hyemalis (winter bentgrass, ticklegrass)
Agrostis scabra, "hair grass" (rough bent grass, winter bent grass, ticklegrass)
Aira, hairgrass
Aira caryophyllea, silver hairgrass
Aira praecox, early hair grass
Corynephorus canescens, grey hair-grass
Deschampsia, hair grass
Eleocharis acicularis, dwarf hairgrass
Eleocharis parvula, "hairgrass" (dwarf spikerush, small spikerush)
Koeleria glauca, Blue Hair Grass
Koeleria macrantha, crested hair grass
Koeleria vallesiana, Somerset hair grass
Rostraria cristata, Mediterranean hair grass
