North Cambridge is located at the northernmost part of the city and borders on Somerville, Arlington, and Belmont. North Cambridge is a neighborhood of over 11,000 residents living in housing types ranging from condos to single families and multi-family homes to large apartment buildings. Porter Square, at the southeastern corner of the neighborhood, is a main commercial and transit center with Red Line, commuter rail and bus stations. The main avenue through North Cambridge is Massachusetts Avenue, which extends from Porter Square to the Arlington border and features a variety of retail, office and residential uses and types. At the western end of the neighborhood is the MBTA Alewife Red Line station and an adjacent office/industrial area along Cambridgepark Drive.