| Post: | Lord Lieutenant |
| Body: | Belfast |
| Insignia: | Belfast City Coat of Arms.svg |
| Insigniasize: | 200 |
| Insigniacaption: | Belfast City Coat of Arms |
| Incumbent: | Dame Fionnuala Jay-O'Boyle |
| Incumbentsince: | 6 July 2014 |
| Appointer: | King Charles III |
| Inaugural: | The 6th Marquess of Londonderry |
| Formation: | 1900 |
The Lord Lieutenant of Belfast is the official representative of The King for the 'County Borough of Belfast', Northern Ireland. The current Lord Lieutenant is Dame Fionnuala Mary Jay-O'Boyle, who was appointed in July 2014. The position was first created in 1900 and was held by The 6th Marquess of Londonderry. The role is largely honorary with the few formal duties relating to liaising with the King's private office in the lead up to visits to the City regarding issues of local concern and the presentation of awards on behalf of the King.[1] The High Sheriff of Belfast is theoretically the King's judicial representative in the city, while the Lord Lieutenant is the Sovereign's personal representative.
20 February 1900 – 1904
19 January 1904 – 1911
4 November 1911 – 6 June 1924
7 July 1924 – 10 May 1950
11 July 1950 – 1985
12 August 1985 – 1991
26 May 2000 – 8 August 2009
9 August 2009 – 6 July 2014
since 6 July 2014
A deputy lieutenant of Belfast is commissioned by the Lord Lieutenant of Belfast. Deputy lieutenants support the work of the lord-lieutenant. There can be several deputy lieutenants at any time, depending on the population of the county. Their appointment does not terminate with the changing of the lord-lieutenant, but they usually retire at age 75.