← 1865 1864 1863 1866 in Norway → 1867 1868 1869
Centuries:	17th 18th 19th 20th 21st
Decades:	1840s 1850s 1860s 1870s 1880s
See also:	1866 in Sweden List of years in Norway

Events in the year 1866 in Norway.

• Monarch: Charles IV.^[1]

This section needs expansion. You can help by adding to it. (October 2010)

• 5 March – The official inauguration of the Parliament of Norway Building (Norwegian: Stortingsbygningen).

• Erika Nissen, pianist, makes her concert debut in Berlin

• 5 January – Johan Gjøstein, educator, newspaper editor and politician (died 1935).^[2]
• 21 January – Olaus Alvestad, educator and newspaper editor (died 1903)
• 15 March – Johan Vaaler, inventor (died 1910)
• 25 April – Aasulv Olsen Bryggesaa, politician and Minister (died 1922)
• 29 April – Kristian Prestgard, editor of Decorah-Posten (died 1946)
• 10 May – Thorolf Holmboe, painter (died 1935)
• 24 June – Peter Karl Holmesland, jurist and politician (died 1933)

• 29 July – Jens Zetlitz Monrad Kielland, architect (died 1926)
• 12 August – Johan Opsahl, politician
• 2 September – August Herman Halvorsen, politician (died 1929)
• 13 September – Ole Østmo, rifle shooter and Olympic medallist (died 1923)
• 28 October – Peter Collett Solberg, businessperson and politician (died 1934)
• 1 November – Betzy Kjelsberg, politician and feminist (died 1950)
• 29 November – Johan Friele, sailor and Olympic gold medallist (died 1927)
• 2 December – Ingvald Anker Andersen, politician

• Simon Christian Hammer, writer and journalist (died 1932)
• Jenova Martin, suffragist and writer (died 1937)^[3]
• Sigbjørn Obstfelder, writer (died 1900)

• 20 March – Rikard Nordraak, composer (born 1842)
• 24 November – Peder Christian Hersleb Kjerschow, bishop (born 1786)

• Nicolai Benjamin Cappelen, jurist and politician (born 1795)
• Louise Brun, actor (born 1831)
• Conradine Birgitte Dunker, socialite and writer (born 1780)
• Ole Paulssøn Haagenstad, politician (born 1775)
• Jørgen Fredrik Spørck, military officer and politician (born 1787)