Avon is a census-designated place (CDP) in Powell County, Montana, United States.

The town sits along the Little Blackfoot River, and serves as a gateway to the Beaverhead-Deerlodge National Forest.

[4] The town served as a supply point for nearby ranchers, prospectors, and miners.

According to the United States Census Bureau, the CDP has a total area of 13.4 square miles (35 km2), all land.

There were 30.8% of families and 41.2% of the population living below the poverty line, including 63.2% of under eighteens and 16.7% of those over 64.