1900 – town-to-be reportedly held only 13 European males.
Another report said 40 or 50 members of Ngāti Hau and Mr Bell.

1901 – Railways line joining Te Kuiti to Taumarunui opened.

1903 – Railway line passes through Taumarunui, and Taumarunui Railway Station opened on 1 December 1903 and Matapuna on 22 June 1903.

1904 – First European child is born in township.

1904 – £10,000 houseboat built then floated to Ohura river junction.
In 1927 this is transferred down river to Retaruke River junction where it was destroyed by fire in 1933.

1906 – Native town council set up: Hakiaha Tawhiao, J.E.Ward (Interpreter), J.Carrington.
E.W.Simmons, A.J.Langmuir (Chairman), J.E.Slattery.

1906, 14 Sep – First issue of the Taumarunui Press.

1907 – First hospital erected, 5 beds.

1908–09 – North Island Main Trunk opened to through Auckland-Wellington trains from 9 November 1908, with the first NIMT express trains from 14 February 1909.

1908–11 William Thomas Jennings elected Member of Parliament for Taumarunui electorate
1910 – Borough of Taumarunui proclaimed.

1910 – Kaitieke Co-op Dairy Co. formed.

1910 – George Henry Thompson defeated Rev John E. Ward (166 to 143 votes) to become the first borough council mayor.

1912 – Population: Males: 641; Females: 487 – Note: 1912 census did not include a count of Maori.

1912 – Township started getting water supply from Waitea Creek, just south of Piriaka.
 Project cost £13,000.
 Pipeline 8 miles long.

1913 – William Henry Wackrow – Mayor
1913, 22 Jul – First reported cases of Smallpox in district.

1911–14 Charles Wilson elected Member of Parliament
1914 – Taumarunui gas supply begins
1914–18 – World War I
1914–19 – William Thomas Jennings re-elected Member of Parliament
1915 – Taumarunui Hospital Board formed, 30 beds.

1915 – Only a single car in town.

1915–1917 – Mayor: G.S. Steadman.

1916 – Census: 3,021 (Taumarunui & Manunui)
1917 – Tuku Te Ihu Te Ngarupiki, Chief of Rangatahi, dies in Matapuna near Taumarunui aged 97.

1917–1919 – Mayor: A.S. Laird.

1919–1923 – Mayor: G.S. Steadman.

1923–1925 – Mayor: C.C. Marsack.

1924 – The Piriaka Power Station was built to supply electricity to Taumarunui.

1925–1929 – Mayor: G.E. Manson.

1928 – Four thousand bales of wool shipped down river
1929–1944 – Mayor: Cecil Boles.

1932 – Stratford–Okahukura Line completed.

1939 – Hatricks's steamer ceased running, final section of the journey having been done by coach from Kirikau landing since 1927.

1939–1945 – World War II
1941 – Cosmopolitan Club established with Father Conboy as first president.

1944–1947 – W.S.N. Campbell.

1947–1953 – Mayor: D.H. Hall.

1951 – Census: 3,220
1952 – Kaitieke County and Ohura County amalgamated with Taumarunui County.

1953–1956 – Mayor: David C. Seath – later Member of Parliament for the King Country
1956 – Mayor: Frank D. House – later Taumarunui High School governor.

1956 – Census: 3,341
1961 – Census: 4,961
1962 – The King Country Electric Power Board commissioned its Kuratau Power Station.

1966 – 1 October, 6:00pm – King Country Radio 1520AM with the call sign 1ZU first broadcasts from Taumarunui.

1968 – N.Z. Sportsmen's dinner – attended by Fred Allen, Peter Snell, Waka Nathan, Colin Meads, Bob Skelton, Taini Jamieson, Tilley Vercoe, Ivan Grattan, Bill Wordley, Don Croot, Trevor Ormsby, Hine Peni and Sonny Bolstad.

1971 – Additional generator to the Piriaka Power Scheme
1976, Oct 4 – Daniel Houpapa shot by Armed Offenders Squad after he fires at an officer
1981 – Census: 6,540, Full-time in labour force: 2,727
1986 – Census: 6,468, Full-time in labour force: 2,514
1988 – Taumarunui District Council formed.

Town Mayors immediately prior to 1988 include: Charles Binzegger, Les Byars and Terry Podmore.

1989, Nov 1 – Taumarunui District Council merged into Ruapehu District Council.

1991 – Census: 6,141, Full-time in labour force: 1,935
1996 – Census: 5,835, Full-time in labour force: 1,438
1997/98 – AFFCO Holdings freezing works closes.
1900 – town-to-be reportedly held only 13 European males. Another report said 40 or 50 members of Ngāti Hau and Mr Bell.
1901 – Railways line joining Te Kuiti to Taumarunui opened.
1903 – Railway line passes through Taumarunui, and Taumarunui Railway Station opened on 1 December 1903 and Matapuna on 22 June 1903.
1904 – First European child is born in township.
1904 – £10,000 houseboat built then floated to Ohura river junction. In 1927 this is transferred down river to Retaruke River junction where it was destroyed by fire in 1933.
1906 – Native town council set up: Hakiaha Tawhiao, J.E.Ward (Interpreter), J.Carrington. E.W.Simmons, A.J.Langmuir (Chairman), J.E.Slattery.
1906, 14 Sep – First issue of the Taumarunui Press.
1907 – First hospital erected, 5 beds.
1908–09 – North Island Main Trunk opened to through Auckland-Wellington trains from 9 November 1908, with the first NIMT express trains from 14 February 1909.
1908–11 William Thomas Jennings elected Member of Parliament for Taumarunui electorate
1910 – Borough of Taumarunui proclaimed.
1910 – Kaitieke Co-op Dairy Co. formed.
1910 – George Henry Thompson defeated Rev John E. Ward (166 to 143 votes) to become the first borough council mayor.
1912 – Population: Males: 641; Females: 487 – Note: 1912 census did not include a count of Maori.
1912 – Township started getting water supply from Waitea Creek, just south of Piriaka.  Project cost £13,000.  Pipeline 8 miles long.
1913 – William Henry Wackrow – Mayor
1913, 22 Jul – First reported cases of Smallpox in district.
1911–14 Charles Wilson elected Member of Parliament
1914 – Taumarunui gas supply begins
1914–18 – World War I
1914–19 – William Thomas Jennings re-elected Member of Parliament
1915 – Taumarunui Hospital Board formed, 30 beds.
1915 – Only a single car in town.
1915–1917 – Mayor: G.S. Steadman.
1916 – Census: 3,021 (Taumarunui & Manunui)
1917 – Tuku Te Ihu Te Ngarupiki, Chief of Rangatahi, dies in Matapuna near Taumarunui aged 97.
1917–1919 – Mayor: A.S. Laird.
1919–1923 – Mayor: G.S. Steadman.
1923–1925 – Mayor: C.C. Marsack.
1924 – The Piriaka Power Station was built to supply electricity to Taumarunui.
1925–1929 – Mayor: G.E. Manson.
1928 – Four thousand bales of wool shipped down river
1929–1944 – Mayor: Cecil Boles.
1932 – Stratford–Okahukura Line completed.
1939 – Hatricks's steamer ceased running, final section of the journey having been done by coach from Kirikau landing since 1927.
1939–1945 – World War II
1941 – Cosmopolitan Club established with Father Conboy as first president.
1944–1947 – W.S.N. Campbell.
1947–1953 – Mayor: D.H. Hall.
1951 – Census: 3,220
1952 – Kaitieke County and Ohura County amalgamated with Taumarunui County.
1953–1956 – Mayor: David C. Seath – later Member of Parliament for the King Country
1956 – Mayor: Frank D. House – later Taumarunui High School governor.
1956 – Census: 3,341
1961 – Census: 4,961
1962 – The King Country Electric Power Board commissioned its Kuratau Power Station.
1966 – 1 October, 6:00pm – King Country Radio 1520AM with the call sign 1ZU first broadcasts from Taumarunui.
1968 – N.Z. Sportsmen's dinner – attended by Fred Allen, Peter Snell, Waka Nathan, Colin Meads, Bob Skelton, Taini Jamieson, Tilley Vercoe, Ivan Grattan, Bill Wordley, Don Croot, Trevor Ormsby, Hine Peni and Sonny Bolstad.
1971 – Additional generator to the Piriaka Power Scheme
1976, Oct 4 – Daniel Houpapa shot by Armed Offenders Squad after he fires at an officer
1981 – Census: 6,540, Full-time in labour force: 2,727
1986 – Census: 6,468, Full-time in labour force: 2,514
1988 – Taumarunui District Council formed.
Town Mayors immediately prior to 1988 include: Charles Binzegger, Les Byars and Terry Podmore.
1989, Nov 1 – Taumarunui District Council merged into Ruapehu District Council.
1991 – Census: 6,141, Full-time in labour force: 1,935
1996 – Census: 5,835, Full-time in labour force: 1,438
1997/98 – AFFCO Holdings freezing works closes.
Taumarunui