Events in the year 1889 in Norway.

• Monarch – Oscar II.^[1]
• Prime Minister: Johan Sverdrup, then Emil Stang

• The metric system was introduced in Norway (the actual law having been passed in 1875).
• The Scandinavian mile was introduced in Norway.

• The local newspaper Farsunds avis was established.
• The local newspaper Lindesnes was established.

• 20 January – Tryggve Gran, aviator, explorer and author (died 1980)
• 2 February – Hartmann Bjørnsen, gymnast and Olympic gold medallist (died 1974)
• 3 February – Andreas Strand, gymnast and Olympic silver medallist (died 1958)
• 28 February – Hermann Helgesen, gymnast and Olympic silver medallist (died 1963)
• 16 February – Kristian Mathias Fimland, politician
• 22 April – Jacob Pedersen, track and field athlete (died 1961)
• 27 April – Arnulf Øverland, author (died 1968)
• 2 May – Margit Schiøtt, politician (died 1946)
• 16 May – Johan Faye, sailor and Olympic silver medallist (died 1975)
• 20 May – Rolf Lie, gymnast and Olympic gold medallist
• 4 June – Thor Jensen, gymnast and Olympic bronze medallist (died 1950)
• 18 June – Per Krohg, artist (died 1965)
• 9 July – Nils Thomas, sailor and Olympic silver medallist (died 1979)
• 17 August – Lalla Carlsen, singer and actress (died 1967).^[2]
• 25 August – Aslaug Vaa, poet and playwright (died 1965).^[3]
• 2 October – Ingolf Rød, sailor and Olympic gold medallist (died 1963)
• 24 October – Anders Kristian Orvin, geologist and explorer (died 1980)
• 5 November – Einar Staff, wholesaler (died 1972).^[4][5]
• 20 November – Nils Fixdal, athlete (died 1972)
• 26 November – Olaf Ørvig, sailor and Olympic gold medallist (died 1939)
• 2 December – Harald Færstad, gymnast and Olympic silver medallist (died 1979)
• 3 December – Edvin Paulsen, gymnast and Olympic bronze medallist (died 1963)
• 26 December – Ragnhild Kaarbø, painter (died 1949).^[6]

• Kornelius Bergsvik, politician (died 1975)
• Thor Bjørklund, carpenter and inventor of the cheese slicer (died 1975)
• Johan Cappelen, jurist and politician (died 1947)
• Gunnar Gunnarsson Helland, Hardanger fiddle maker (died 1976)
• Asbjørn Lindboe, politician and Minister (died 1967)
• Henry Rudi, huntsman and polar bear hunter (died 1970)
• G. Unger Vetlesen, shipbuilder and philanthropist (died 1959)

• 10 January – Martin Andreas Udbye, composer and organist (born 1820)
• 25 January –
  • Johan Jeremiassen, ship-owner, consul and politician (born 1843)
  • Johan Lauritz Sundt, industrialist (born 1828).^[7]
• 28 February – Gustava Kielland, author and missionary (born 1800)
• 10 April – Christian Collett Kjerschow, politician (born 1821)
• 24 June – August Thomle, jurist and politician (born 1816)
• 29 June – Gustav Christian Gjøs, politician (born 1810)
• 16 September – Iver Steen Thomle, jurist (born 1812)
• 19 October – Jacob Kielland, naval officer and politician (born 1825)
• 23 December – Johan Jørgen Lange Hanssen, politician (born 1821)
• Job Dischington Bødtker, jurist and politician (born 1818)
• Ole Jacob Broch, politician and Minister (born 1818)
• Halvor Olsen Folkestad, councillor of state (born 1807)
• Ketil Motzfeldt, politician and Minister (born 1814)