| Honorific-Prefix: | The Honourable |
| Dan Riddiford | |
| Parliament2: | New Zealand |
| Term Start2: | 26 November 1960 |
| Term End2: | 25 November 1972 |
| Predecessor2: | Frank Kitts |
| Successor2: | Ken Comber |
| Office3: | 21st Attorney-General of New Zealand |
| Term Start3: | 2 February 1971 |
| Term End3: | 9 February 1972 |
| Predecessor3: | Jack Marshall |
| Successor3: | Roy Jack |
| Office4: | 34th Minister of Justice |
| Primeminister4: | Keith Holyoake |
| Term Start4: | 22 December 1969 |
| Term End4: | 9 February 1972 |
| Predecessor4: | Ralph Hanan |
| Successor4: | Roy Jack |
| Birth Date: | 11 March 1914 |
| Birth Place: | Featherston, New Zealand |
| Death Place: | Wellington, New Zealand |
| Party: | National |
| Profession: | Lawyer |
Daniel Johnston Riddiford (11 March 1914 – 26 October 1974) was a New Zealand politician of the National Party.
Riddiford was born in Featherston in 1914 a grandson of "King" Riddiford and Sydney Johnston of Oruawharo. He was educated in the UK at Downside School, Somerset, and New College, Oxford. He gained an MA in Modern Greats from Oxford, and also an LLB from the University of New Zealand. From 1932 to 1937, he farmed in the Wairarapa on family-owned land.
For a number of years Riddiford was also a director of The Dominion newspaper (now The Dominion Post).
He joined the New Zealand Expeditionary Force in 1939 and was an officer with the Royal Regiment of New Zealand Artillery. He was a prisoner of war in Italy from 1941 until his escape in 1943. He was awarded the MC in World War II. From 1946, he had a law practice in Wellington.
Riddiford contested the electorate in the, but was beaten by the incumbent, Labour's Michael Moohan. In the, he stood in the electorate and defeated the incumbent, Labour's Frank Kitts. Riddiford's win in Wellington Central was considered a surprise as the electorate had been held by Labour for the previous 42 years as well as Riddiford's rather aristocratic manner of campaigning which many thought unsuitable within an urban liberal electorate. In 1970 he suffered a heart attack. Riddiford would remain in Parliament until 1972, when he retired and succeeded by Ken Comber. Under Keith Holyoake, he was Minister of Justice (1969–1972) and Attorney-General (1971–1972).
He married his wife, Yvonne Ada Westmacott, in 1952.[1] Earle Riddiford a notable New Zealand mountaineer and a lawyer was also a cousin.
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