Burley () is a city in Cassia and Minidoka counties in the southern Idaho, United States. The population was 10,345 at the 2010 census. The city is the county seat of Cassia County.
Burley is the principal city of the Burley, Idaho Micropolitan Statistical Area, which includes Cassia and Minidoka counties. Burley is the third-largest city in Idaho's Magic Valley region after Twin Falls and Jerome. Along with nearby Rupert it forms the bulk of the "Mini-Cassia" area of southern Idaho.
A post office called Burley has been in operation since 1905. The community was named after David Ellsworth Burley, a railroad official.
Most of the city lies in Cassia County, with only a small portion extending into Minidoka County.
According to the United States Census Bureau, the city has a total area of 6.44 square miles (16.68 km2), of which 6.12 square miles (15.85 km2) is land and 0.32 square miles (0.83 km2) is water.
Burley experiences a semi-arid climate (Köppen BSk) with cold winters and hot, dry summers. Burley is also host to incredibly high wind speeds. In 2008 a group of local farmers sued the Idaho BLM. Because pesticides that the Burley BLM office sprayed on their lands were carried by a wind storm onto farmers lands, effectively destroying crops.