Carnegie is located in the county of Allegheny. It covers a total area of 4.1 sq. km. The economy of the city revolves around industries involved in advertising, aviation, arts and crafts, automotive, construction, apparel, information technology, electric equipments, freight forwarding, insurance, metal, oil and lubrication and publishing, contributing to the local economy in a positive way. Commercial spaces are utilized by thrift shops, tourist information centers, restaurants and recording studios, contributing to the economy in a positive way.