Sewickley is a borough in Allegheny County, Pennsylvania, 12 miles (19 km) west northwest of Pittsburgh along the Ohio River. It is a residential suburb of Pittsburgh. The population was 3,827 at the 2010 census. The Sewickley Bridge crosses the Ohio River at Sewickley. According to the United States Census Bureau, the borough has a total area of 1.1 square miles (2.8 km2), of which, 1.0 square mile (2.6 km2) of it is land and 0.1 square miles (0.26 km2) of it (11.11%) is water.
There are several private schools in the area; Sewickley Academy, St. James Catholic School and Eden Christian Academy. The public school system, Quaker Valley School District, is renowned for an innovative laptop-technology grant received in 2000 from former Pennsylvania governor Tom Ridge. Quaker Valley School District is often regarded as one of the best and academically top-ranked school districts in the nation. In the spring of 2006, U.S.News & World Report ranked Quaker Valley High School among the top 2% of high schools nationwide. The Sewickley Public Library of the Quaker Valley School District is a Library Journal Star Library for the third year in a row and is continuously one of the top 25 largest libraries in the Pittsburgh Business Times Book of Lists.