| David Walter Groos | |
| Birth Date: | 20 April 1918 |
| Birth Place: | Milwaukee, Wisconsin, United States |
| Riding: | Victoria |
| Term Start: | April 1963 |
| Term End: | September 1972 |
| Predecessor: | Albert McPhillips |
| Successor: | Allan McKinnon |
| Profession: | naval officer |
| Party: | Liberal |
David Walter Groos (20 April 1918 – 12 January 1976) was a Liberal party member of the House of Commons of Canada. He was born in Milwaukee, Wisconsin, United States and became a naval officer by career.
He was first elected at the Victoria riding in the 1963 general election, after previous defeats at the Esquimalt—Saanich riding in the 1962 election and in a 29 May 1961 by-election.
Groos was re-elected at Victoria in the 1965 and 1968 elections. After finishing his term in the 28th Canadian Parliament, he was defeated by Allan McKinnon of the Progressive Conservative party in the 1972 federal election.
In 1964, Groos purchased what is today maintained as Emily Carr House. The Emily Carr Foundation was formed in 1967 to preserve the building.[1]