Dublin 4 is a postal district in Dublin, Ireland, known for its affluent neighborhoods and vibrant culture. It includes areas such as Ballsbridge, Donnybrook, and Sandymount, which are characterized by elegant homes, parks, and a mix of residential and commercial spaces. The district is also home to several embassies and institutions, contributing to its cosmopolitan atmosphere. The area is well-connected to the rest of the city, making it a desirable location for both residents and businesses. Notable landmarks include Lansdowne Road Stadium, the home of Leinster Rugby, and UCD, one of Ireland's leading universities.