Eau Claire, PA
Eau Claire is a borough in Butler County, Pennsylvania, United States. The population was 355 at the 2000 census. The name means "Clear Water" in French, and the name is pronounced as though it were spelled "O'Clare."
Eau Claire is located at 41°8′7″N 79°47′52″W / 41.13528°N 79.79778°W / 41.13528; -79.79778 (41.135335, -79.797914).
According to the United States Census Bureau, the borough has a total area of 1.4 square miles (3.5 km²), all of it land.