The Regency style of architecture refers primarily to buildings built in Britain during the period in the early 19th century when George IV of the United Kingdom was still Prince Regent, and also to later buildings following the same style.

The style follows closely on from the neo-classical Georgian Style of architecture, adding an elegance and lightness of touch. Many buildings of this style have a white painted stucco facade and an entryway to the main front door (usually coloured black) which is framed by two columns. Regency residences typically are built as terraces or crescents. Elegant wrought iron balconies and bay windows came into fashion as part of this style.

An instigator of this style was John Nash who designed the Regency terraces of Regent's Park and Regent Street in London. Excellent examples of Regency properties dominate the city of Brighton in Sussex, south of London in the U.K.. In London itselft there are many streets in the areas around Victoria, Pimlico, Mayfair and other central districts.

The term Regency style is also applied to interior design of the period, typified by elegant furniture and vertically striped wallpaper, and to styles of clothing; for males, these were typified by the dandy Beau Brummell.