The American Killifish Association is a national organization based in the United States. However, membership is open to all people of all countries.

The aims of the association are to advance the enjoyment, propagation, study and conservation of killifish (oviparous Cyprinodontiform fish) and to promote fellowship amongst its members. The AKA maintains a number of programs to further these aims. These include the bimonthly publication of the Journal of the American Killifish Association and the monthly publication of a Business Newsletter. The latter includes a Fish and Egg Listing in which members can list fish and eggs for sale or wanted. The AKA also provides an auction site dedicated specifically to killifish, killifish eggs and related items.

The AKA holds an annual convention and killifish show once each year.

A number of regional clubs throughout North America are affiliated with the AKA and share its objectives. These clubs meet regularly and hold annual shows. Through these meetings and shows, affiliate clubs provide one of the best ways to acquire killifish and to obtain advice on keeping them.

The AKA also provides the forums on this site, which allow all interested parties to exchange information and opinions on killifish, the AKA, and related topics.