Architectural styles classify architecture in terms of form, techniques, materials, time period, region, etc. It overlaps with, and emerges from the study of the evolution and history of architecture. In architectural history, the study of Gothic architecture, for instance, would include all aspects of the cultural context that went into the design and construction of these structures. Architectural style is a way of classifying architecture that gives emphasis to characteristic features of design, leading to a terminology such as Gothic "style".
The Victoria and Albert Museum maintains an interactive online microsite with an introductory overview of ten architectural styles grouped in four clusters:

Modern, High-Tech and Postmodern
East Asian, South Asian and Spanish Islamic
Gothic and Gothic Revival
Classical and Classical Revival. Pre-history to the present

Adam style 1770 England
American Craftsman 1890s–1930 USA, California & east
American Empire (style) 1810
Amsterdam School 1912–1924 Netherlands
Ancient Egyptian architecture 3000 BC–373 AD
Ancient Greek architecture 776 BC-265 BC
Arcology 1970s-present
Art Deco 1925–1940s Europe & USA
Australian architectural styles
Baroque architecture
Bauhaus 1919–1930s
Beaux-Arts architecture
Biedermeier 1815–1848
Blobitecture 2003–today
Brick Gothic c.1350–c.1400
Bristol Byzantine 1850-1880
Brutalist architecture 1950s–1970s
Byzantine architecture 527 (Sofia)-1520
Chicago school (architecture) 1880s and 1890 USA
City Beautiful movement 1890–1900s USA
Classical architecture 600 BC-323 AD
Colonial Revival architecture
Constructivist architecture
Deconstructivism 1982–today
Decorated Period c.1290–c.1350
Early English Period c.1190—c.1250
Egyptian Revival architecture 1809–1820s, 1840s, 1920s
Elizabethan architecture (b.1533 – d.1603)
Empire (style) 1804 to 1814, 1870 revival
English Baroque 1666 (Great Fire)–1713 (Treaty of Utrecht)
Expressionist architecture 1910–ca. 1924
Federal architecture
Futurist architecture 1909 Europe
Georgian architecture
Googie architecture 1950s America
Gothic architecture
Gothic Revival architecture 1760s–1840s
Greek Revival architecture
Heliopolis style 1905–ca. 1935 Egypt
International style (architecture) 1930–today
Italianate 1802
Jacobethan 1838
Jugendstil 1888 to 1911 German Art Nouveau
Manueline 1495 to 1521 (reign)
Mediterranean Revival Style 1920s–1930s USA
Memphis Group 1981-1988
Metabolist Movement 1959 Japan
Mid-century modern 1950s California, etc.
Mission Revival Style architecture 1894-1936
Modern movement 1927–1960s
Modernisme 1888 to 1911 Catalonian Art Nouveau
National Park Service Rustic 1872–1916 USA
Nazi architecture 1933-1944 Germany
Neo-Byzantine architecture 1882–1920s American
Neoclassical architecture
Neo-Grec 1848 and 1865
Neo-gothic architecture
Neolithic architecture 10,000 BC-3000 BC
New towns 1946-1968 United Kingdom
Norman architecture 1074-1250
Palladian architecture 1616–1680 (Jones)
Perpendicular Period c.1350–c.1550
Postmodern architecture 1980s
Prairie Style 1900–1917 USA
Pueblo style 1898-1990s
Queen Anne Style architecture 1870–1910s UK & USA
Queenslander (architecture) 1840s–1960s
Regency architecture
Richardsonian Romanesque 1880s USA
Rococo
Roman architecture 753 BC–663 AD
Romanesque architecture 1050-1100
Romanesque Revival architecture 1840–1900 USA
Russian architecture 989 - 1700s
Russian Revival 1826 - 1917, 1990s - present
Secessionism
Second Empire 1865 and 1880
Shingle Style or stick style 1879-1905 New England
Sicilian Baroque 1693 earthquake–c.1745
Spanish Colonial Revival style 1915–1940 USA
Spanish Colonial style 1520s–c.1550
Stalinist architecture 1933–1955 USSR
Stick style
Streamline Moderne 1930–1937
Sumerian architecture 5300 BC–2000 BC
Tudor style architecture 1485–1603
Tudorbethan architecture 1835–1885
Ukrainian Baroque late 1600 - 1800s
Usonian 1936–1940s USA
Victorian architecture 1837 and 1901 UK