The largest residential area in Castle Hill is located at the two sides of Showground Road, sandwiched between the commericalcommercial and the industrial area. Smaller residential areas are located at the east of the commercial area, as well as the suburb's north-east (part of [[Hornsby Shire, New South Wales|Hornsby Shire]], seperatedseparated by Old Northern Road and Castle Hill Road). These consist almost entirely of free-standing houses, many of which are project homes dubbed "McMansions". Several government and private schools, as well as an [[RSL]] Club, are located within these areas.
One of the many clubs that meets at the [[RSL]] on a regular basis is the
