| Massereene Lower Mása Ríona Íochtarach (Irish) | |
|---|---|
|  Location of Massereene Lower, County Antrim, Northern Ireland. | |
| Sovereign state | United Kingdom | 
| Country | Northern Ireland | 
| County | Antrim | 
Massereene Lower (Irish: Mása Ríona Íochtarach) is a barony in County Antrim, Northern Ireland. To its west lies Lough Neagh, and it is bordered by four other baronies: Massereene Upper to the south; Belfast Upper to the east; Antrim Upper to the north; and Toome Upper to the north-west.
Below is a list of settlements in Massereene Lower:
Below is a list of civil parishes in Massereene Lower:
The barony contains the largest concentration of ringforts in Ireland, with three ringforts per square kilometre.