Massereene Upper

{{Short description|Barony in Northern Ireland}}

{{Use dmy dates|date=July 2023}}

{{Use British English|date=May 2013}}

{{Infobox settlement

| name = Massereene Upper

| native_name = Mása Ríona Uachtarach (Irish)

| settlement_type =

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| image_map = MassereeneUpper barony.png

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| map_caption = Location of Massereene Upper, County Antrim, Northern Ireland.

| subdivision_type = Sovereign state

| subdivision_name = United Kingdom

| subdivision_type1 = Country

| subdivision_name1 = Northern Ireland

| subdivision_type2 = County

| subdivision_name2 = Antrim

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Massereene Upper is a barony in southwest County Antrim, Northern Ireland. It roughly matches the former district of Killultagh ({{Irish place name|Coill Ultaigh|the woods of the Ulsterfolk}}).[https://www.placenamesni.org/resultdetails.php?entry=18988 Killultagh]. Place Names NI. It includes settlements such as Crumlin, Glenavy, Lower Ballinderry, Maghaberry and Aghalee. To its east lies Belfast Lough, and it is bordered by four other baronies: Massereene Lower to the north; Belfast Upper to the east; Castlereagh Upper to the south-east; and Iveagh Lower, Lower Half to the south-west.