| Henry Carwithen McQuillan | |
| Birth Date: | 1906 9, df=yes |
| Birth Place: | Courtenay, Canada |
| Spouse: | Lucy Anne Brocklehurst |
| Riding: | Comox—Alberni |
| Term Start: | March 1958 |
| Term End: | June 1962 |
| Predecessor: | Thomas Speakman Barnett |
| Successor: | Thomas Speakman Barnett |
| Profession: | Contractor, logger |
| Party: | Progressive Conservative |
| Footnotes: | [1] |
Henry Carwithen McQuillan (30 September 1906 - 28 April 1979) was a Progressive Conservative party member of the House of Commons of Canada. Born in Courtenay, British Columbia, he was a contractor and logger by career.
He made an unsuccessful attempt to defeat CCF incumbent Thomas Speakman Barnett at the Comox—Alberni riding in the 1957 federal election. McQuillan succeeded in the 1958 election, serving in the 24th Parliament before Barnett retook the riding in the 1962 election.
McQuillan also served as a school trustee at one time.