| Birth Date: | 1886 6, df=yes |
| Birth Place: | Dundas, Ontario |
| Death Place: | Vancouver, British Columbia |
| Spouse: | Jean A. McGillivray m. 24 June 1914[1] |
| Riding: | Burrard |
| Predecessor: | Sanford Johnston Crowe |
| Successor: | riding dissolved |
| Term Start: | December 1921 |
| Term End: | October 1925 |
| Riding2: | Vancouver—Burrard |
| Predecessor2: | riding created |
| Successor2: | Wilfred Hanbury |
| Term Start2: | October 1925 |
| Term End2: | May 1930 |
| Office3: | 23rd President of the Canadian Bar Association |
| Predecessor3: | E. Gordon Gowling, K.C. |
| Successor3: | André Taschereau, c.r. |
| Term Start3: | 1951 |
| Term End3: | 1952 |
| Profession: | Barrister and solicitor |
| Party: | Conservative |
| Branch: | Canadian Expeditionary Force |
| Serviceyears: | 1914–1919 |
| Rank: | Brigadier General |
| Unit: | 72nd Battalion (Seaforth Highlanders of Canada), CEF |
| Commands: | 7th Canadian Brigade (1918–19) 72nd Battalion (1915–18) |
| Battles: | First World War |
| Mawards: | Companion of the Order of St Michael and St George Distinguished Service Order & Two Bars Mentioned in Despatches (5) |
Brigadier General John Arthur Clark, (8 June 1886 – 18 January 1976) was a Conservative member of the House of Commons of Canada. He was born in Dundas, Ontario and became a barrister and solicitor.
Clark attended secondary school in Vancouver, then studied at the University of Toronto and Osgoode Hall Law School, earning Bachelor of Arts and Bachelor of Laws degrees. During his career, he founded the law firm Clark Wilson along with his childhood friend and Second-in-Command, Alexander Wilson.
He served as a soldier during World War I, from 1914 to 1918 as commander of the 72nd Seaforth Highlanders and from 1918 to the war's end with the 7th Canadian Brigade (3rd Canadian Division). His awards include the Companion of the Order of St Michael and St George (CMG) and the Distinguished Service Order (DSO) with two Bars. The second bar to his DSO appeared in The London Gazette in December 1918 and reads as follows:
He was first elected to Parliament at the Burrard riding in the 1921 general election. With riding boundary changes, Clark became a candidate for Vancouver—Burrard and won election there in 1925 and 1926. After completing his third House of Commons term, the 16th Canadian Parliament, Clark left federal politics and did not seek re-election in the 1930 election.
Clark served as president of the Canadian Bar Association from 1951 to 1952.[2]