Listed buildings in Northern Ireland
This is a list of listed buildings in Northern Ireland, which are among the listed buildings of the United Kingdom.
Key
| Grade | Criteria |
| A | Buildings of greatest importance to Northern Ireland including both outstanding architectural set-pieces and the least altered examples of each representative style, period and grouping. |
| B+ | Buildings which might have merited grade A status but for detracting features such as an incomplete design, lower quality additions or alterations. Also included are buildings that because of exceptional features, interiors or environmental qualities are clearly above the general standard set by grade B buildings. A building may merit listing as grade B+ where its historic importance is greater than a similar building listed as grade B. |
| B1 | Buildings of local importance and good examples of a particular period or style. A degree of alteration or imperfection of design may be acceptable. |
| B2 | Buildings of local importance and good examples of a particular period or style. A degree of alteration or imperfection of design may be acceptable. |
The organization of the lists in this series is on the same basis as the statutory register. The county names are those used in the register, which in the case of Northern Ireland means the province's six traditional counties.
Grade A listed buildings in Northern Ireland
| County | Number | |
| 1 | List of Grade A listed buildings in County Antrim | 80 |
| 2 | List of Grade A listed buildings in County Armagh | 32 |
| 3 | List of Grade A listed buildings in County Down | 43 |
| 4 | List of Grade A listed buildings in County Fermanagh | 9 |
| 5 | List of Grade A listed buildings in County Londonderry | 19 |
| 6 | List of Grade A listed buildings in County Tyrone | 23 |
| TOTAL | Grade A listed buildings in Northern Ireland | 206 |
Grade B+ listed buildings in Northern Ireland
| County | Number | |
| 1 | List of Grade B+ listed buildings in County Antrim | 157 |
| 2 | List of Grade B+ listed buildings in County Armagh | 48 |
| 3 | List of Grade B+ listed buildings in County Down | 164 |
| 4 | List of Grade B+ listed buildings in County Fermanagh | 34 |
| 5 | List of Grade B+ listed buildings in County Londonderry | 65 |
| 6 | List of Grade B+ listed buildings in County Tyrone | 110 |
| TOTAL | Grade B+ listed buildings in Northern Ireland | 578 |