鱼鸟（Ichthyornis）是一种已经灭绝的鸟类，生存在白垩纪的北美洲，牠们的化石可以在加拿大亚伯达省、萨克其万、美国阿拉巴马州、堪萨斯州、新墨西哥州与德州被发现。

• Ichthyornis dispar: A toothed, flying bird from the Late Cretaceous of Kansas by Mike Everhart, Oceans of Kansas website. Retrieved 2006-09-16.

Ichthyornis (meaning "fish bird", after its fish-like vertebrae) was a genus of toothed seabird-like ornithuran from the late Cretaceous period of North America. Its fossil remains are known from the chalks of Alberta, Alabama, Kansas, New Mexico, Saskatchewan, and Texas, in strata that were laid down in the Western Interior Seaway during the Turonian through Campanian ages, about 95-83.5 million years ago. Ichthyornis is a common component of the Niobrara Formation fauna, and numerous specimens have been found.