| Robert Harcourt | |
| Office: | Lord Mayor of Belfast |
| Term Start: | 1955 |
| Term End: | 1957 |
| Predecessor: | Percival Brown |
| Successor: | Cecil McKee |
| Office1: | High Sheriff of Belfast |
| Term Start1: | 1948 |
| Term End1: | 1949 |
| Predecessor1: | James Henry Norritt |
| Successor1: | Stuart Knox Henry |
| Office2: | Member of the Northern Ireland Senate |
| Term Start2: | 1955 |
| Term End2: | 1957 |
| Office3: | Member of the Northern Ireland Parliament for Belfast Woodvale |
| Term Start3: | 4 April 1950 |
| Term End3: | 15 November 1955 |
| Predecessor3: | John William Nixon |
| Successor3: | Neville Martin |
| Birth Date: | 1902 |
| Birth Place: | Belfast, Northern Ireland |
| Death Date: | 25 August 1969 |
| Party: | Ulster Unionist |
Sir Robert John Rolston Harcourt, JP (1902 – 25 August 1969) was a Northern Irish unionist politician.
Robert Harcourt, known as John, became the director of F. E. Harcourt and Company coal merchants. He was High Sheriff of Belfast in 1949, and later in the year unsuccessfully stood as the Ulster Unionist Party (UUP) candidate for South Down. Soon after this, John William Nixon, the independent Unionist MP for Belfast Woodvale, died. Harcourt stood in the ensuing by-election on 4 April 1950 and was elected.[1]
In 1955, Harcourt was elected Lord Mayor of Belfast, a position which carried with it an ex officio position in the Senate of Northern Ireland. He served until 1957, when he was knighted.
Harcourt was an active member of the Orange Order and a Member of the prestigious Belfast lodge, Royal York LOL 145.