Maghery (from Irish an Machaire, meaning 'the plain') is a small village and townland in County Armagh, Northern Ireland. It lies on the southwest shore of Lough Neagh, near Derrywarragh Island, in the northwest corner of the county. As it sits between the estuaries of the rivers Blackwater and Bann (which are only two miles apart), Maghery was of strategic significance in the past.

In the 2001 census Maghery had a population of 2001 people. It lies within the Armagh City, Banbridge and Craigavon Borough Council area. It has a park.

Maghery is a shortening of the older name Magherygreenan, which is anglicized from Irish Machaire Grianáin.

In the Maghery area there is a tradition of an ancient road between Armagh and Coney Island known as St Patrick's Trail, which in the past facilitated travel through Armagh to the north and the south of the county via causeways. Various stretches of this trail have also been identified in the neighbouring townland of Derrylileagh as well as a number of others in the locality.

In November 1830, Ribbonmen attacked an Orange band, puncturing some of their drums. In retaliation, the Orangemen 'completely wrecked' (burned to the ground) the Catholic village of Maghery in the passive presence of Colonel Verner (a magistrate) and some of the constabulary police. Seven Orangemen were later charged with offences relating to the attack. All were acquitted. However, some of the victims submitted accounts of the attack to the Parliamentary Select Committee that investigated Orange parades and violence in 1835. The following account of three of their submissions is taken from Two Hundred Years in the Citadel; a research paper by Dr Peter Mulholland, an anthropologist from the nearby town of [Portadown].

Eleanor Campbell, sworn: –Resides in Maghery and keeps a public house; it is near the Blackwater foot, near the quay; was there on Monday the 22nd November last, between 11 and 12 o’clock, as near as she can recollect; was out standing before the door; a great number of men came down across the fields and attacked the house; four men attacked the four windows; deponent then went into the house for fear of her life; the windows were smashed, sashes and all; they attacked deponent’s two daughters in her house, to beat and abuse them; two young men of the party came in, and one of them fired a gun in the house up at the deponent’s son, who was on the loft and had made a noise to come down when he saw the men going to abuse his sister; the skirts of the deponent’s son’s coat appeared as if they had been perforated with shot from the gun; it might have been done with slugs; four or five men then attacked the deponent herself with bayonets, and threatened to take her life if she would not give up a gun which they said she had; they swore deponent on her hand and by the five crosses to tell where it was, and deponent had to send out for it; they got it, and took it away.

A lump of a boy, about 16 or 17 years of age, came forward with a bayonet fastened on a stick, and made a stab at deponent, which struck her; deponent was wounded on her forehead with the bayonet, she thinks by the boy who had it; was also knocked down by a blow of a stone, which she thinks he held in his hand, and which stunned her; all deponent’s delf, glass, and furniture were broken; her spirits and beer spilled, and her clock broken; all the spirits and beer in the bar were spilled; thinks five or six gallons of spirits were spilled; they also robbed deponent of her money, notes, silver, and halfpence, destroyed her feather bed; they took away table linen, and sheets and shirts, and coats, and her children’s clothes, and also a great deal of her own clothes, and left her very little behind; never saw any of the party before, to her knowledge; would not have known her child she was so much confused and put through other; thinks the party was disguised; the boy who struck deponent had his cap drawn down over his forehead; deponent was so frightened she could not tell any of the crowd; they cried out ‘'We are Killyman boys,’’ and would clear all before them; and to see what Lord Charlemont would do for her now; did not know any person by the name of Carner in that neighborhood; deponent thinks 14 or 15 of the party came into her house, as well as she can tell; it is not positive, they were all under arms, and had weapons of some kind or other; some guns, some bayonets, one man had a scyth, and another had a large sword, horseman’s, or like one of the policemen’s; they came in in two or three parties; first, four at a time, then five, then three, and so on; they were in deponent’s house very nearly an hour, more or less; deponent, after her house was wrecked (in about five or six minutes after) saw two policemen, Moneypenny and Crawford; thinks they were not under arms then, but they may have had their side arms; Did not see any other person that deponent knows; at that time they were doing no harm; she reflected on them for not coming down to save her. Sergeant Crawford came into deponent’s house, and the others went down to his brother’s boat; deponent is not just sure, can’t say exactly, but has heard and thinks there were 26 houses wrecked and injured in the town; very few escaped; deponent’s house is quite the opposite end of the town from where the row took place on Saturday; deponent saw no other person that she knew but the two policemen.

Catherine Donnelly, sworn: –Recollects the 22nd November last; was in Maghery on that day; is daughter of last witness, Eleanor Campbell; was at her mother’s house when the party came there; her own house was locked up. When the party came into town, deponent ran with her children to a lighter to save them. She had locked her own house; when she went back to her own house she found it locked; the party must have got in by the window; the door was not forced but the windows were broken; she found her husband’s and her own clothing burning; some of the furniture was injured, broken; whilst in her mother’s house heard a gun fired therein; saw several men with guns and bayonets on them in the house. Deponent did not then, nor does she now, know any of the party concerned in the outrage, she was so much thunderstruck; saw no stranger in the town that day that she knew; she called on Stewart Moneypenny to go up the town with her; he refused, and said he could not do anything for her. Was in Maghery on the Saturday when the scrimage took place; she was in her own house, and four of her children with her; there were men that had been saving her house that morning from the storm; swears positively that no men left her house that day to take part in the ruction.