Wilson’s Phalaropes (Phalaropus tricolor) nest commonly throughout much of the Great Plains and Great Basin regions of the U.S. and Canada as far south as the central parts of Utah and Nevada and south-central California (American Ornithologists’ Union, Check-list of North American Birds, 1957). Prior to 1981, however, this species had never been reported to nest in Arizona. This note documents the nesting of Wilson’s Phalaropes at Pintail Lake in southern Navajo County, Arizona, during 1981 and 1982.