| Official Name: | Mullaghboy |
| Irish Name: | Mullach Buidhe |
| Population: | 364 |
| Population Ref: | (2011 Census) |
| Country: | Northern Ireland |
| Postcode Area: | BT |
| Postcode District: | BT40 |
| Dial Code: | 028 |
| Hide Services: | yes |
Mullaghboy [1] is a small village and townland (of 251 acres) on Islandmagee in County Antrim, Northern Ireland. It is situated in the civil parish of Islandmagee and the historic barony of Belfast Lower.[2] It is within the Larne Borough Council area. It had a population of 364 people (148 households) in the 2011 Census.[3] (2001 Census: 294 people).