The Parliamentary Boundaries (Ireland) Act 1832 (2 & 3 Will. 4. c. 89) was an act of the Parliament of the United Kingdom which defined the boundaries of the 33 parliamentary boroughs which were represented in the United Kingdom House of Commons under the Acts of Union 1800. It followed a boundary report. Section 12 of the Representation of the People (Ireland) Act 1832, enacted on the same day, specified that the boundaries were to be defined in this separate act.

It was enacted a month after the Parliamentary Boundaries Act 1832, which had set out the boundaries of constituencies in England and Wales as required by the Reform Act 1832.

From 1801, the parliamentary boroughs of Dublin City and Cork City each had two MPs. Under section 11 of the Representation of the People (Ireland) Act 1832, a second seat was granted to the boroughs of Belfast, Galway, Limerick City, and Waterford. Each of the 32 counties of Ireland continued to send two MPs to Westminster. Overall, the Representation of the People (Ireland) Act 1832 increased the representation of Ireland from 100 to 105, with Dublin University also increasing its representation from one to two MPs.

The 1832 general election was held later that year under the new boundaries.

Under the Sligo and Cashel Disfranchisement Act 1870 (33 & 34 Vict. c. 38), the boroughs of Cashel and Sligo were disfranchised due to corruption.

Under the Redistribution of Seats Act 1885 (48 & 49 Vict. c. 23), which took effect at the 1885 general election, 22 of the Irish parliamentary boroughs ceased to exist, with the area becoming part of the relevant county.

The whole act, so far as unrepealed, was repealed by section 1(1) of, and the first schedule to, the Statute Law Revision Act 1950 (14 Geo. 6. c. 6), which came into force on 23 May 1950.

The whole act was repealed for the Republic of Ireland by section 3 of, and the first schedule to, the Electoral Act 1963, which came into force on 9 December 1963.

Schedule of boundaries Armagh From Mr. Carroll's Windmill on the West of the City in a straight Line in the Direction of the Spire of Grange Church to the Point at which such straight Line cuts the new Dungannon Road; thence in a straight Line in the Direction of the Eastern Dome of the Observatory to the Point at which such straight Line cuts the Boundary of the Grounds attached to the Observatory; thence, Eastward, along the Boundary of the Grounds of the Observatory to the Point at which the same meets the Road to the Deanery; thence in a straight Line to the Magazine near the Infantry Barracks; thence in a straight Line, through a Point on the Rich Hill Road which is distant Twenty-five Yards (measured along the Rich Hill Road) to the East of the South-eastern Corner of the Infantry Barracks, to a Point which is One hundred and thirty Yards beyond the said Point on the Rich Hill Road; thence in a straight Line in the Direction of the South-eastern Angle of the Palace to the Point at which such straight Line cuts the Demesne Wall; thence, Northward, along the Demesne Wall to the Point at which the same leaves the Boundary of the Corporation Land; thence, Northward, along the Boundary of the Corporation Land to the Point at which the same meets the Monaghan Road; thence in a straight Line to Mr. Carroll's Windmill. 1 Athlone From the Point at which the Southern End of the Canal joins the River Shannon, along the Canal, to the Point at which the Northern End thereof joins the River Shannon; thence along the River Shannon to the Point at which the same is met by the North-western Inclosure Wall of the Barracks; thence in a straight Line to the Angle in the Hare Island Road at which the same turns Northward, and at which there are Two Gateways with Pillars opposite each other; thence in a straight Line to a Gateway with Pillars on the Ballymahon Road, about Twenty Yards to the East of the Glebe Wall; thence in a straight Line to the North-eastern Corner of the Wall of the Townland called Anchor's Bower; thence, Southward, along the Wall of Anchor's Bower to the Point at which the same meets the old Dublin Road; thence in a straight Line in the Direction of Mr. Dawson's House in Bunavally to the Point at which such straight Line cuts a small Bye Road which runs into the Dublin Road; thence along the said small Bye Road to the Point at which the same joins the Dublin Road; thence in a straight Line to the Point at which the Brideswell Bog Road is joined by a Bye Road leading thereto from the East, about Three hundred Yards from the Point at which the Brideswell Bog Road leaves the Dublin Road; thence in a straight Line in the Direction of the Chimney of Mr. Robinson's Distillery to the Point at which such straight Line cuts the River Shannon; thence along the River Shannon to the Point first described. 1Bandon From the Point at which she Eastern Road to Macroom leaves the old or Northern Road to Cork, in a straight Line in a Westerly Direction, to the Northwestern Corner of Mr. Swanson's Garden; thence along the Wall of the said Garden to the South-western Corner thereof; thence in a straight Line across the River Bandon, and across the Enniskane Road, to the Point at which the old Road to Clonakilty is joined by a Bye Road which runs thereto from the new Road to Clonakilty; thence along the said Bye Road to the Point at which the same joins the new Road to Clonakilty; thence towards Bandon, along the new Road to Clonakilty, to that Point thereof which is nearest to the Northern Pillar of the Gate of Mr. M'Creight's House; thence in a straight Line to the said Northern Pillar; thence in a straight Line across the Centre Kilbritten Road to the Point at which the Eastern Kilbritten Road is joined by a small Bye Road running Westward to the Fields, about Three hundred and thirty Yards to the South of the Point at which the Eastern Kilbritten Road leaves the Inneshannon Road; thence in a straight Line to the Southern Corner, on the Ballinade Road, of the Premises of Mr. Ormond's Distillery; thence, Eastward, along the Boundary of the Premises of Mr. Ormond's Distillery to the Point at which the same meets the southernmost Road to Innishannon; thence in a straight Line across the River Bandon to the Point at which the old Innishannon Road is joined by a Bye Road which runs North-west in the Direction of the Kilbrogan Chapel; thence in a straight Line to the Northern Pillar of a Gateway on the old Cork Road, about Four hundred and thirty Yards to the North of the Point at which the same leaves the Inneshannon Road; thence in a straight Line to the Point first described. 1Belfast From the Point on the South-east of the Town at which the Blackstaff River joins the River Lagan, up the Blackstaff River, to the Point at which the same is joined by a small Stream which washes the Wall of Mr. Campbell's Cotton Works; thence up the said small Stream to the Point at which the same would be cut by a straight Line to be drawn from the Chimney of Mr. Campbell's Cotton Works to an old Fort on the West of the Town, in a Field belonging to Mr. Elliot, near a Brickfield on the Left of the old Lodge Road; thence in a straight Line to the said old Fort; thence in a straight Line to the South-western Angle of the Grave-yard which is to the West of the Infantry Barracks; thence along the Southern Wall of the said Grave-yard to the Point at which the same makes an Angle; thence in a straight Line to the South-western Angle of the Enclosure of the Infantry Barracks; thence along the Western Enclosure Wall of the Infantry Barracks to the Northern Extremity thereof; thence along a Ditch which is the Boundary of the Ordnance Land to the Point at which the same reaches the South-western Angle of the Enclosure of the Artillery Barracks; thence along the Western Enclosure Wall of the Artillery Barracks, and along a Ditch in continuation of the Direction thereof, to the Point at which such Ditch meets a Road which leads from the Ballynure Road into the old Carrickfergus Road; thence along the Road so leading into the old Carrickfergus Road to the Point at which the same joins the old Carrickfergus Road; thence, Northward, along the old Carrickfergus Road to the Point at which the same meets the Mile Water; thence down the Mile Water to the Point at which the same joins the River Lagan; thence along the River Lagan to the Point first described; also beyond the Lagan, the Townland of Ballymacarrett. 2Carlow From the Point below the Town at which the River Barrow is met by the Southern Wall of the Grounds of the House belonging to Mr. Carey, Adjutant to the Carlow Militia, Eastward, along the said Wall to the Point at which the same meets the Kilkenny Road; thence in a straight Line to the Southern Corner of the Infirmary; thence in a straight Line to the Point a little above the Barracks at which the River Burren is joined by a small Stream; thence up the said Stream, and across the Tullow Road, to the Point at which the same Stream is met by a Hedge which runs down thereto from opposite the Southern End of the Plantation attached to the House on the Baltinglass Road which belongs to Mr. Hunt and is occupied by Mr. Butler; thence along the said Hedge to the Point at which the same meets the Baltinglass Road; thence in a straight Line in the Direction of the Cupola of the Lunatic Asylum to the Point at which such straight Line cuts a Road which runs between the Baltinglass Road and the Dublin Road; thence in a straight Line to a Gate on the Eastern Side of the Dublin Road which is distant about One hundred Yards to the North of the North-eastern Corner of the Enclosure Wall of the Lunatic Asylum; thence in a straight Line to the Point at which the Road to Athy is met by the North Boundary of the Demesne of the Roman Catholic Bishop; thence along the said Boundary till it Meets the River at the Point; thence along the River to the North Corner of the Wall of the Burial Ground; thence in a straight Line to the Spire of Graigue Church; thence in a straight Line to the Summer House in Mr. Wilson's Garden; thence in a straight Line to the Point first described. 1Carrickfergus The County of the Town of Carrickfergus. 1CashelThe whole of the District under the Jurisdiction of the Mayor; and in addition thereto,

The Space which lies between he Boundary of the said Jurisdiction and a straight Line to be drawn from the North-eastern Corner of the Enclosure Wall of the Charter School on the Dublin Road, in a South-easterly Direction, to the Point at which the southernmost Killenaule Road is met by a Wall which runs thereto from the northernmost Fethard Road, and which Point is about One hundred and seventy-six Yards Northwest of the Point at which the Southern-most Killenaule Road leaves the northernmost Fethard Road;