| Honorific-Prefix: | The Honourable |
| Hugh Havelock MacLean | |
| Constituency Mp: | Sunbury—Queen's |
| Parliament: | Canadian |
| Predecessor: | Robert Duncan Wilmot |
| Successor: | District abolished (1914) |
| Term Start: | 1908 |
| Term End: | 1917 |
| Constituency Mp2: | Royal |
| Parliament2: | Canadian |
| Predecessor2: | District established (1914) |
| Successor2: | George Burpee Jones |
| Term Start2: | 1917 |
| Term End2: | 1921 |
| Order3: | 17th |
| Office3: | Lieutenant Governor of New Brunswick |
| Predecessor3: | William Frederick Todd |
| Successor3: | Murray MacLaren |
| Term Start3: | December 28, 1928 |
| Term End3: | January 31, 1935 |
| Monarch3: | George V |
| Governor General3: | The Earl of Willingdon The Earl of Bessborough |
| Premier3: | John B. M. Baxter Charles D. Richards Leonard P. D. Tilley |
| Birth Date: | 3 March 1854 |
| Birth Place: | Fredericton, New Brunswick |
| Death Place: | Saint John, New Brunswick, Canada |
| Nationality: | Canadian |
| Party: | Liberal |
| Branch: | General Officer Commanding New Brunswick Troops |
| Rank: | Major General |
Hugh Havelock MacLean (March 3, 1854 - November 22, 1938) was a Canadian soldier, politician, and the 17th Lieutenant Governor of New Brunswick from 1928 to 1935.
Born in Fredericton, New Brunswick, the son of Lauchlan and Sophia LeBrun Duplissie (Marsh) McLean, McLean was educated at the Fredericton Grammar School. He was called to the New Brunswick Bar in 1875 and created a King's Counsel in 1899. He was elected to the House of Commons of Canada for the New Brunswick electoral district of Sunbury—Queen's in the 1908 federal election. A Liberal, he was re-elected in the 1911 federal election and the 1917 federal election for the electoral district of Royal. In 1917, he crossed the floor and sat as a Unionist. From 1928 to 1935, he was the Lieutenant Governor of New Brunswick.[1]
He served with the Canadian Militia and was a captain and adjutant for the 62nd Saint John Fusiliers. He eventually became a lieutenant-colonel and was the commanding officer. From 1903 to 1911, he was the commandant of the 12th Infantry Brigade. From 1911 to 1915, he commanded the 28th New Brunswick Dragoons. He was promoted to colonel and was commander of Canadian Coronation Troops for the coronation of King George V. During World War I, he was appointed officer commanding New Brunswick Troops in April 1915 and in June 1916 he was promoted to brigadier general. He was promoted to major general upon his retirement from the active militia in 1917.
He died in Saint John, New Brunswick in 1938.[2]