Sayornis saya, commonly known as the Say's Phoebe, is native to North America. Its geographical distribution includes western parts of North America, ranging from Alaska and Western Canada down through the United States to central Mexico.

The Say's Phoebe typically inhabits dry, open areas such as deserts, grasslands, and farmlands. It is often found in arid or semi-arid environments where there is sparse vegetation.

This species is primarily found in lowland desert areas, but also occupies open woodlands, sagebrush plains, badlands, and mountainous regions up to the tree line. Say's Phoebe is an insectivore, catching insects in flight and contributing to the control of insect populations in these habitats.