A dace is any of a number of species of small cyprinid fish.

The unmodified name is usually a reference to the common dace Leuciscus leuciscus but it may also mean:

• Fallfish Semotilus corporalis (Canada)
• Chinese mud carp Cirrhinus chinensis (Hong Kong)

"Dace" also appears in combination to designate a variety of species:

• Blacknose dace Rhinichthys atratulus
• Blackside dace Phoxinus cumberlandensis
• Columbia River dace Ptychocheilus oregonensis
• Danilevskii's dace Leuciscus danilewskii
• Desert dace Eremichthys acros
• Eurasian dace Leuciscus leuciscus
• Finescale dace Phoxinus neogaeus
• Horned dace Semotilus atromaculatus
• Issyk-Kul dace Leuciscus bergi
• Lake Candidus dace Candidia barbatus
• Las Vegas dace Rhinichthys deaconi
• Leopard dace Rhinichthys falcatus
• Longfin dace Rhinichthys chrysogaster
• Longnose dace Rhinichthys cataractae
• Mexican dace Evarra bustamantei/eigenmanni/tlahuacensis
• Moapa dace Moapa coriacea
• Mountain blackside dace Phoxinus cumberlandensis
• Mountain redbelly dace Phoxinus oreas
• Nachtrieb dace Margariscus margarita
• Northern dace Margariscus margarita
• Northern pearl dace Margariscus margarita
• Northern redbelly dace Phoxinus eos
• Northwest dace Mylocheilus caurinus
• Pearl dace Margariscus margarita
• Redbelly dace Phoxinus eos
• Relict dace Relictus solitarius
• Rosyside dace Clinostomus funduloides
• Saskatchewan dace Platygobio gracilis
• Schmidt's dace Leuciscus schmidti
• Shining dace Semotilus corporalis
• Siberian dace Leuciscus baicalensis
• Southern redbelly dace Phoxinus erythrogaster
• Speckled dace Rhinichthys osculus
• Syr-Darya dace Leuciscus squaliusculus
• Tennessee dace Phoxinus tennesseensis
• Umatilla dace Rhinichthys umatilla
• Umpqua dace Rhinichthys evermanni
• Zeravshan dace Leuciscus lehmanni

In the United Kingdom, the European seabass Dicentrarchus labrax may be called "sea dace ".

See also spinedace , spikedace , and vendace .

Several US Navy submarines have been named USS Dace after the fish.