# Montgomeryshire (UK Parliament constituency)

Montgomeryshire (Welsh: Sir Drefaldwyn) was a constituency in Wales represented in the House of Commons of the UK Parliament.
Created in 1542, it elected one Member of Parliament (MP), formerly known as the knight of the shire, by the first-past-the-post system of election. It was abolished following the 2023 Periodic Review of Westminster constituencies prior to the 2024 general election and replaced by Montgomeryshire and Glyndŵr.
The Montgomeryshire Senedd constituency was created with the same boundaries in 1999 (as an Assembly constituency).

## Boundaries and political history

The seat was based on the ancient county of Montgomeryshire, in the principal area of Powys. One of Britain's most rural and isolated constituencies, Montgomeryshire elected Liberal or Liberal-affiliated candidates from 1880, until a Conservative victory in the 1979 general election. In the 1983 general election it was the only seat in England and Wales where a sitting Conservative MP was unseated, while nationally the party's seat majority increased. However, in 2010, the Conservatives won and held the seat in 2015 and 2017, with an increased majority. The seat was officially known as Montgomery before 1997. At the time of its abolition, Montgomeryshire was the only seat in Wales never to have elected a Labour MP.
Until 1918 this seat, in common with many others, contained an enclaved seat, which comprised the boroughs of Montgomery, Llanfyllin, Llanidloes, Newtown and Welshpool. This seat survived the Redistribution of Seats Act 1885 which abolished many similar seats. The seat was finally abolished in 1918 and absorbed into the wider Montgomeryshire seat.
Under proposed constituency boundary changes announced in September 2016, ahead of the next general election, the seat was to be partitioned, the northern half including Welshpool to be merged with Clwyd South to form a new seat of South Clwyd and North Montgomeryshire; most of the southern including Newtown was to be merged with the Brecon and Radnor seat to form a seat renamed as Brecon, Radnor and Montgomery, and the wards of Llanidloes and Blaen Hafren merged into the Ceredigion constituency which would form part of a new seat called Ceredigion and North Pembrokeshire. However, the general elections of 2017 and 2019 were fought on existing boundaries.

### Abolition

The constituency was abolished as part of the 2023 Periodic Review of Westminster constituencies and under the June 2023 final recommendations of the Boundary Commission for Wales for the 2024 United Kingdom general election. The entire constituency became part of the new Montgomeryshire and Glyndŵr.

## Members of Parliament
### 1542–1604

| Parliament | Member |
| 1542 | James Leche |
| 1545 | Humphrey Lloyd |
| 1547 | Humphrey Lloyd |
| 1553 (Mar) | Edward Herbert |
| 1553 (Oct) | Edward Herbert |
| 1554 (Apr) | Edward Herbert |
| 1554 (Nov) | Edward Herbert |
| 1555 | Not known |
| 1558 | Edward Herbert |
| 1559 (Jan) | Edward Herbert I |
| 1562–1563 | Edward Herbert I |
| 1571 | Edward Herbert I |
| 1572 | John Price |
| 1584 (Oct) | Richard Herbert |
| 1586 (Oct) | Oliver Lloyd |
| 1588 (Oct) | Edward Herbert I |
| 1593 | Reginald Williams |
| 1597 (Sep) | William Herbert |
| 1601 (Oct) | Edward Herbert |

### 1604–present

| Election | Member | Party |
| 1604–1611 | William Herbert | |
| 1614 | William Herbert | |
| 1621–1622 | William Herbert | |
| 1624 | William Herbert | |
| 1624–1629 | William Herbert | |
| 1640 | Richard Herbert | |
| 1640–1642 | John Pryce | |
| 1642 | Seat vacant from 12 September 1642, when Pryce was disabled from sitting | Seat vacant from 12 September 1642, when Pryce was disabled from sitting |
| 1647 | Edward Vaughan | |
| 1648 | Seat vacant after Vaughan was excluded in Pride's Purge | Seat vacant after Vaughan was excluded in Pride's Purge |
| 1653 | Not separately represented in the Barebones Parliament | Not separately represented in the Barebones Parliament |
| 1654–1655 (two members) | Charles Lloyd | |
| 1654–1655 (two members) | John Pryce | |
| 1656–1658 (two members) | Charles Lloyd | |
| 1656–1658 (two members) | Hugh Pryce | |
| 1659 | Edward Vaughan | |
| 1660 | John Purcell | |
| 1661 | Edward Vaughan | |
| 1661 by-election | Hon. Andrew Newport | Conservative |
| 1679 | Edward Vaughan | Conservative |
| 1719 | Hon. Price Devereux | Conservative |
| 1740 | Robert Williams | |
| 1741 | Sir Watkin Williams-Wynn | Conservative |
| 1742 | Robert Williams | |
| 1747 | Edward Kynaston | |
| 1772 | Watkin Williams | |
| 1774 | William Mostyn Owen | |
| 1795 | Francis Lloyd | |
| 1799 | Charles Williams-Wynn | Tory |
| 1834 | Charles Williams-Wynn | Conservative |
| 1850 by-election | Herbert Williams-Wynn | Conservative |
| 1862 by-election | Charles Williams-Wynn | Conservative |
| 1880 | Stuart Rendel | Liberal |
| 1894 by-election | Arthur Humphreys-Owen | Liberal |
| 1906 | David Davies | Liberal |
| 1929 | Clement Davies | Liberal |
| 1931 | Clement Davies | National Liberal |
| 1939 | Clement Davies | Independent |
| 1942 | Clement Davies | Liberal |
| 1962 by-election | Emlyn Hooson | Liberal |
| 1979 | Delwyn Williams | Conservative |
| 1983 | Alex Carlile | Liberal |
| 1988 | Alex Carlile | Liberal Democrat |
| 1997 | Lembit Öpik | Liberal Democrat |
| 2010 | Glyn Davies | Conservative |
| 2019 | Craig Williams | Conservative |
| 2024 | Constituency abolished | Constituency abolished |

## Elections
### Elections in the 19th century
#### Elections in the 1830s

General election 1830: Montgomery :
| Party | Party | Candidate | Votes | % | ±% |
| | Tory | Charles Williams-Wynn | Unopposed | Unopposed | Unopposed |
| Registered electors | Registered electors | Registered electors | c. 1,110 | |
| | Tory hold | Tory hold | Tory hold | Tory hold | Tory hold |
1830 Montgomeryshire by-election :
| Party | Party | Candidate | Votes | % | ±% |
| | Tory | Charles Williams-Wynn | Unopposed | Unopposed | Unopposed |
| Registered electors | Registered electors | Registered electors | c. 1,110 | |
| | Tory hold | Tory hold | Tory hold | Tory hold | Tory hold |
* Caused by Williams-Wynn's appointment as a Commissioner for the Affairs of India
General election 1831: Montgomery :
| Party | Party | Candidate | Votes | % | ±% |
| | Tory | Charles Williams-Wynn | 703 | 70.0 | N/A |
| | Whig | Joseph Hayes Lyon | 302 | 30.0 | N/A |
| Majority | Majority | Majority | 401 | 40.0 | N/A |
| Turnout | Turnout | Turnout | 1,005 | c. 90.5 | N/A |
| Registered electors | Registered electors | Registered electors | c. 1,110 | |
| | Tory hold | Tory hold | Tory hold | Tory hold | Tory hold |
General election 1832: Montgomery :
| Party | Party | Candidate | Votes | % | ±% |
| | Tory | Charles Williams-Wynn | Unopposed | Unopposed | Unopposed |
| Registered electors | Registered electors | Registered electors | 2,525 | |
| | Tory hold | Tory hold | Tory hold | Tory hold | Tory hold |
General election 1835: Montgomery :
| Party | Party | Candidate | Votes | % | ±% |
| | Conservative | Charles Williams-Wynn | Unopposed | Unopposed | Unopposed |
| Registered electors | Registered electors | Registered electors | 2,737 | |
| | Conservative hold | Conservative hold | Conservative hold | Conservative hold | Conservative hold |
General election 1837: Montgomery :
| Party | Party | Candidate | Votes | % | ±% |
| | Conservative | Charles Williams-Wynn | Unopposed | Unopposed | Unopposed |
| Registered electors | Registered electors | Registered electors | 2,819 | |
| | Conservative hold | Conservative hold | Conservative hold | Conservative hold | Conservative hold |

#### Elections in the 1840s

General election 1841: Montgomery :
| Party | Party | Candidate | Votes | % | ±% |
| | Conservative | Charles Williams-Wynn | Unopposed | Unopposed | Unopposed |
| Registered electors | Registered electors | Registered electors | 2,936 | | |
| | Conservative hold | Conservative hold | Conservative hold | Conservative hold | Conservative hold |
General election 1847: Montgomery :
| Party | Party | Candidate | Votes | % | ±% |
| | Conservative | Charles Williams-Wynn | Unopposed | Unopposed | Unopposed |
| Registered electors | Registered electors | Registered electors | 3,214 | | |
| | Conservative hold | Conservative hold | Conservative hold | Conservative hold | Conservative hold |

#### Elections in the 1850s

1850 Montgomeryshire by-election :
| Party | Party | Candidate | Votes | % | ±% |
| | Conservative | Herbert Watkin Williams-Wynn | Unopposed | Unopposed | Unopposed |
| | Conservative hold | Conservative hold | Conservative hold | Conservative hold | Conservative hold |
* Caused by Williams-Wynn's death.
General election 1852: Montgomery :
| Party | Party | Candidate | Votes | % | ±% |
| | Conservative | Herbert Watkin Williams-Wynn | Unopposed | Unopposed | Unopposed |
| Registered electors | Registered electors | Registered electors | 2,986 | | |
| | Conservative hold | Conservative hold | Conservative hold | Conservative hold | Conservative hold |
General election 1857: Montgomery :
| Party | Party | Candidate | Votes | % | ±% |
| | Conservative | Herbert Watkin Williams-Wynn | Unopposed | Unopposed | Unopposed |
| Registered electors | Registered electors | Registered electors | 2,872 | | |
| | Conservative hold | Conservative hold | Conservative hold | Conservative hold | Conservative hold |
General election 1859: Montgomery :
| Party | Party | Candidate | Votes | % | ±% |
| | Conservative | Herbert Watkin Williams-Wynn | Unopposed | Unopposed | Unopposed |
| Registered electors | Registered electors | Registered electors | 2,723 | | |
| | Conservative hold | Conservative hold | Conservative hold | Conservative hold | Conservative hold |

#### Elections in the 1860s

1862 Montgomeryshire by-election :
| Party | Party | Candidate | Votes | % | ±% |
| | Conservative | Charles Williams-Wynn | 1,269 | 57.0 | N/A |
| | Liberal | Sudeley Hanbury-Tracy | 959 | 43.0 | N/A |
| Majority | Majority | Majority | 310 | 14.0 | N/A |
| Turnout | Turnout | Turnout | 2,228 | 83.3 | N/A |
| Registered electors | Registered electors | Registered electors | 2,675 | | |
| | Conservative hold | Conservative hold | Swing | | |
* Caused by Williams-Wynn's death.
General election 1865: Montgomery :
| Party | Party | Candidate | Votes | % | ±% |
| | Conservative | Charles Williams-Wynn | Unopposed | Unopposed | Unopposed |
| Registered electors | Registered electors | Registered electors | 3,339 | | |
| | Conservative hold | Conservative hold | Conservative hold | Conservative hold | Conservative hold |
General election 1868: Montgomery :
| Party | Party | Candidate | Votes | % | ±% |
| | Conservative | Charles Williams-Wynn | Unopposed | Unopposed | Unopposed |
| Registered electors | Registered electors | Registered electors | 4,810 | | |
| | Conservative hold | Conservative hold | Conservative hold | Conservative hold | Conservative hold |

#### Elections in the 1870s

General election 1874: Montgomery :
| Party | Party | Candidate | Votes | % | ±% |
| | Conservative | Charles Williams-Wynn | Unopposed | Unopposed | Unopposed |
| Registered electors | Registered electors | Registered electors | 5,014 | | |
| | Conservative hold | Conservative hold | Conservative hold | Conservative hold | Conservative hold |

#### Elections in the 1880s

General election 1880: Montgomery :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal | Stuart Rendel | 2,232 | 52.2 | N/A |
| | Conservative | Charles Williams-Wynn | 2,041 | 47.8 | N/A |
| Majority | Majority | Majority | 191 | 4.4 | N/A |
| Turnout | Turnout | Turnout | 4,273 | 80.8 | N/A |
| Registered electors | Registered electors | Registered electors | 5,291 | | |
| | Liberal gain from Conservative | Liberal gain from Conservative | Swing | N/A | |
General election 1885: Montgomery :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal | Stuart Rendel | 4,044 | 54.4 | +2.2 |
| | Conservative | Charles Williams-Wynn | 3,389 | 45.6 | −2.2 |
| Majority | Majority | Majority | 655 | 8.8 | +4.4 |
| Turnout | Turnout | Turnout | 7,433 | 83.8 | +3.0 |
| Registered electors | Registered electors | Registered electors | 8,870 | | |
| | Liberal hold | Liberal hold | Swing | +2.2 | |
General election 1886: Montgomery :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal | Stuart Rendel | 3,799 | 54.1 | −0.3 |
| | Conservative | Devereux Herbert Mytton | 3,220 | 45.9 | +0.3 |
| Majority | Majority | Majority | 579 | 8.2 | −0.6 |
| Turnout | Turnout | Turnout | 7,019 | 79.1 | −4.7 |
| Registered electors | Registered electors | Registered electors | 8,870 | | |
| | Liberal hold | Liberal hold | Swing | -0.3 | |

#### Elections in the 1890s

General election 1892: Montgomery :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal | Stuart Rendel | 3,662 | 56.3 | +2.2 |
| | Conservative | Devereux Herbert Mytton | 2,847 | 43.7 | −2.2 |
| Majority | Majority | Majority | 815 | 12.6 | +4.4 |
| Turnout | Turnout | Turnout | 6,509 | 73.3 | −5.8 |
| Registered electors | Registered electors | Registered electors | 8,880 | | |
| | Liberal hold | Liberal hold | Swing | +2.2 | |
1894 Montgomeryshire by-election :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal | Arthur Humphreys-Owen | 3,440 | 51.7 | −4.6 |
| | Conservative | Watkin Williams-Wynn | 3,215 | 48.3 | +4.6 |
| Majority | Majority | Majority | 225 | 3.4 | −9.2 |
| Turnout | Turnout | Turnout | 6,655 | 82.2 | +8.9 |
| Registered electors | Registered electors | Registered electors | 8,092 | | |
| | Liberal hold | Liberal hold | Swing | -4.6 | |
* Caused by Rendel's elevation to the peerage.
General election 1895: Montgomery :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal | Arthur Humphreys-Owen | 3,442 | 50.2 | −6.1 |
| | Conservative | Watkin Williams-Wynn | 3,415 | 49.8 | +6.1 |
| Majority | Majority | Majority | 27 | 0.4 | −12.2 |
| Turnout | Turnout | Turnout | 6,857 | 85.8 | +12.5 |
| Registered electors | Registered electors | Registered electors | 7,989 | | |
| | Liberal hold | Liberal hold | Swing | -6.1 | |

### Elections in the 20th century
#### Elections in the 1900s

General election 1900: Montgomery :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal | Arthur Humphreys-Owen | 3,482 | 52.0 | +1.8 |
| | Conservative | Watkin Williams-Wynn | 3,218 | 48.0 | −1.8 |
| Majority | Majority | Majority | 264 | 4.0 | +3.6 |
| Turnout | Turnout | Turnout | 6,700 | 84.6 | −1.2 |
| Registered electors | Registered electors | Registered electors | 7,915 | | |
| | Liberal hold | Liberal hold | Swing | +1.8 | |
General election 1906: Montgomery :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal | David Davies | Unopposed | Unopposed | Unopposed |
| Registered electors | Registered electors | Registered electors | | | |
| | Liberal hold | Liberal hold | Liberal hold | Liberal hold | Liberal hold |

#### Elections in the 1910s

General election January 1910: Montgomery :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal | David Davies | 4,369 | 61.8 | N/A |
| | Conservative | Arthur Williams-Wynn | 2,697 | 38.2 | N/A |
| Majority | Majority | Majority | 1,672 | 23.6 | N/A |
| Turnout | Turnout | Turnout | 7,066 | 89.1 | N/A |
| Registered electors | Registered electors | Registered electors | 7,928 | | |
| | Liberal hold | Liberal hold | Swing | N/A | |
General election December 1910: Montgomery :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal | David Davies | Unopposed | Unopposed | Unopposed |
| Registered electors | Registered electors | Registered electors | 7,928 | | |
| | Liberal hold | Liberal hold | Liberal hold | Liberal hold | Liberal hold |
General election 1918: Montgomery :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal | David Davies | Unopposed | Unopposed | Unopposed |
| Registered electors | Registered electors | Registered electors | 24,949 | | |
| | Liberal hold | Liberal hold | Liberal hold | Liberal hold | Liberal hold |
* Davies was endorsed by the Coalition Government, but refused to accept the coupon.

#### Elections in the 1920s

General election 1922: Montgomery :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal | David Davies | Unopposed | Unopposed | Unopposed |
| Registered electors | Registered electors | Registered electors | 23,802 | | |
| | Liberal hold | Liberal hold | Liberal hold | Liberal hold | Liberal hold |
General election 1923: Montgomery :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal | David Davies | Unopposed | Unopposed | Unopposed |
| Registered electors | Registered electors | Registered electors | 24,126 | | |
| | Liberal hold | Liberal hold | Liberal hold | Liberal hold | Liberal hold |
General election 1924: Montgomery :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal | David Davies | 14,942 | 77.3 | N/A |
| | Labour | Arthur Davies | 4,384 | 22.7 | N/A |
| Majority | Majority | Majority | 10,558 | 54.6 | N/A |
| Turnout | Turnout | Turnout | 19,326 | 79.4 | N/A |
| Registered electors | Registered electors | Registered electors | 24,338 | | |
| | Liberal hold | Liberal hold | Swing | N/A | |
General election 1929: Montgomery :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal | Clement Davies | 12,779 | 46.5 | −30.8 |
| | Unionist | John Murray Naylor | 10,651 | 38.7 | N/A |
| | Labour | John Evans | 4,069 | 14.8 | −7.9 |
| Majority | Majority | Majority | 2,128 | 7.8 | −46.8 |
| Turnout | Turnout | Turnout | 27,499 | 88.3 | +8.9 |
| Registered electors | Registered electors | Registered electors | 31,142 | | |
| | Liberal hold | Liberal hold | Swing | -11.4 | |

#### Elections in the 1930s

General election 1931: Montgomery :
| Party | Party | Candidate | Votes | % | ±% |
| | National Liberal | Clement Davies | Unopposed | Unopposed | Unopposed |
| Registered electors | Registered electors | Registered electors | 30,120 | | |
| | National Liberal hold | National Liberal hold | National Liberal hold | National Liberal hold | National Liberal hold |
General election 1935: Montgomery :
| Party | Party | Candidate | Votes | % | ±% |
| | National Liberal | Clement Davies | Unopposed | Unopposed | Unopposed |
| Registered electors | Registered electors | Registered electors | 30,943 | | |
| | National Liberal hold | National Liberal hold | National Liberal hold | National Liberal hold | National Liberal hold |

#### Elections in the 1940s

General election 1945: Montgomery :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal | Clement Davies | 14,018 | 56.3 | N/A |
| | Conservative | Philip Owen | 10,895 | 43.7 | N/A |
| Majority | Majority | Majority | 3,123 | 13.6 | N/A |
| Turnout | Turnout | Turnout | 24,913 | 77.4 | N/A |
| Registered electors | Registered electors | Registered electors | 32,180 | | |
| | Liberal gain from National Liberal | Liberal gain from National Liberal | Swing | N/A | |

#### Elections in the 1950s

General election 1950: Montgomery :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal | Clement Davies | 14,401 | 50.0 | −6.3 |
| | Conservative | Harry West | 7,621 | 26.5 | −17.2 |
| | Labour | John David Williams | 6,760 | 23.5 | N/A |
| Majority | Majority | Majority | 6,780 | 23.5 | +9.9 |
| Turnout | Turnout | Turnout | 28,782 | 88.9 | +11.5 |
| Registered electors | Registered electors | Registered electors | 32,372 | | |
| | Liberal hold | Liberal hold | Swing | | |
General election 1951: Montgomery :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal | Clement Davies | 17,075 | 68.5 | +18.5 |
| | Labour | David Caradog Jones | 7,854 | 31.5 | +8.0 |
| Majority | Majority | Majority | 9,221 | 37.0 | +13.5 |
| Turnout | Turnout | Turnout | 24,929 | 76.9 | −12.0 |
| Registered electors | Registered electors | Registered electors | 32,423 | | |
| | Liberal hold | Liberal hold | Swing | | |
General election 1955: Montgomery :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal | Clement Davies | 16,021 | 68.0 | −0.5 |
| | Labour | David Caradog Jones | 7,521 | 32.0 | +0.5 |
| Majority | Majority | Majority | 8,500 | 36.0 | −1.0 |
| Turnout | Turnout | Turnout | 23,542 | 73.6 | −3.3 |
| Registered electors | Registered electors | Registered electors | 31,983 | | |
| | Liberal hold | Liberal hold | Swing | -0.5 | |
General election 1959: Montgomery :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal | Clement Davies | 10,970 | 42.0 | −26.0 |
| | Conservative | Frank Leslie Morgan | 8,176 | 31.3 | N/A |
| | Labour | David Caradog Jones | 6,950 | 26.6 | −5.4 |
| Majority | Majority | Majority | 2,794 | 10.7 | −25.3 |
| Turnout | Turnout | Turnout | 26,096 | 83.8 | +10.2 |
| Registered electors | Registered electors | Registered electors | 31,152 | | |
| | Liberal hold | Liberal hold | Swing | | |

#### Elections in the 1960s

1962 Montgomeryshire by-election :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal | Emlyn Hooson | 13,181 | 51.3 | +9.3 |
| | Conservative | Robert H. Dawson | 5,632 | 21.9 | −9.4 |
| | Labour | Tudor Davies | 5,299 | 20.6 | −6.0 |
| | Plaid Cymru | Islwyn Ffowc Elis | 1,594 | 6.2 | N/A |
| Majority | Majority | Majority | 7,549 | 29.4 | +18.7 |
| Turnout | Turnout | Turnout | 25,706 | 85.1 | +1.3 |
| Registered electors | Registered electors | Registered electors | 30,202 | | |
| | Liberal hold | Liberal hold | Swing | | |
General election 1964: Montgomery :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal | Emlyn Hooson | 10,738 | 42.3 | +0.3 |
| | Conservative | Jerry Wiggin | 6,768 | 26.7 | −4.6 |
| | Labour | Gwyn M. Evans | 5,696 | 22.5 | −4.1 |
| | Plaid Cymru | Islwyn Ffowc Elis | 2,167 | 8.5 | N/A |
| Majority | Majority | Majority | 3,970 | 15.6 | +4.9 |
| Turnout | Turnout | Turnout | 25,369 | 84.1 | +0.3 |
| Registered electors | Registered electors | Registered electors | 30,155 | | |
| | Liberal hold | Liberal hold | Swing | | |
General election 1966: Montgomery :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal | Emlyn Hooson | 10,278 | 41.5 | −0.8 |
| | Conservative | Jerry Wiggin | 6,784 | 27.4 | +0.7 |
| | Labour | Gwyn M. Evans | 5,891 | 23.8 | +1.3 |
| | Plaid Cymru | Trefor Edwards | 1,841 | 7.4 | −1.1 |
| Majority | Majority | Majority | 3,494 | 14.1 | −1.5 |
| Turnout | Turnout | Turnout | 24,794 | 82.8 | −1.3 |
| Registered electors | Registered electors | Registered electors | 29,951 | | |
| | Liberal hold | Liberal hold | Swing | | |

#### Elections in the 1970s

General election 1970: Montgomery :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal | Emlyn Hooson | 10,202 | 38.4 | −3.1 |
| | Conservative | Delwyn Williams | 7,891 | 29.7 | +2.3 |
| | Labour | David W. Thomas | 5,335 | 20.1 | −3.7 |
| | Plaid Cymru | Edward Millward | 3,145 | 11.8 | +4.4 |
| Majority | Majority | Majority | 2,311 | 8.7 | −5.4 |
| Turnout | Turnout | Turnout | 26,573 | 82.3 | −0.5 |
| Registered electors | Registered electors | Registered electors | 32,304 | | |
| | Liberal hold | Liberal hold | Swing | | |
General election February 1974: Montgomery :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal | Emlyn Hooson | 12,495 | 45.4 | +7.0 |
| | Conservative | W R C Williams-Wynne | 7,844 | 28.5 | −1.2 |
| | Labour | P W Harries | 4,888 | 17.8 | −2.3 |
| | Plaid Cymru | A P Jones | 2,274 | 8.3 | −3.5 |
| Majority | Majority | Majority | 4,651 | 16.9 | +8.2 |
| Turnout | Turnout | Turnout | 27,501 | 82.6 | +0.3 |
| Registered electors | Registered electors | Registered electors | 33,303 | | |
| | Liberal hold | Liberal hold | Swing | | |
General election October 1974: Montgomery :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal | Emlyn Hooson | 11,280 | 43.1 | −2.3 |
| | Conservative | W R C Williams-Wynne | 7,421 | 28.4 | −0.1 |
| | Labour | P W Harries | 5,031 | 19.2 | +1.4 |
| | Plaid Cymru | A P Jones | 2,440 | 9.3 | +1.0 |
| Majority | Majority | Majority | 3,859 | 14.7 | −2.2 |
| Turnout | Turnout | Turnout | 26,172 | 77.9 | −4.7 |
| Registered electors | Registered electors | Registered electors | 33,583 | | |
| | Liberal hold | Liberal hold | Swing | | |
General election 1979: Montgomery :
| Party | Party | Candidate | Votes | % | ±% |
| | Conservative | Delwyn Williams | 11,751 | 40.3 | +11.9 |
| | Liberal | Emlyn Hooson | 10,158 | 34.9 | −8.2 |
| | Labour | J Price | 4,751 | 16.3 | −2.9 |
| | Plaid Cymru | Carl Clowes | 2,474 | 8.5 | −0.8 |
| Majority | Majority | Majority | 1,593 | 5.4 | N/A |
| Turnout | Turnout | Turnout | 29,134 | 81.4 | +1.5 |
| Registered electors | Registered electors | Registered electors | 35,786 | | |
| | Conservative gain from Liberal | Conservative gain from Liberal | Swing | | |

#### Elections in the 1980s

General election 1983: Montgomery :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal | Alex Carlile | 12,863 | 43.3 | +8.4 |
| | Conservative | Delwyn Williams | 12,195 | 41.1 | +0.8 |
| | Labour | Joe Wilson | 2,550 | 8.6 | −7.7 |
| | Plaid Cymru | Carl Clowes | 1,585 | 5.3 | −3.2 |
| | Independent | David Rowlands | 487 | 1.6 | N/A |
| Majority | Majority | Majority | 668 | 2.2 | N/A |
| Turnout | Turnout | Turnout | 29,680 | 79.2 | −2.2 |
| Registered electors | Registered electors | Registered electors | 37,474 | | |
| | Liberal gain from Conservative | Liberal gain from Conservative | Swing | | |
In 1983 this was Labour's worst performance in Wales and the only seat where Labour won less than 12.5% and lost their £150 deposit. The threshold for retaining deposits was lowered to 5% in 1985.
General election 1987: Montgomery :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal | Alex Carlile | 14,729 | 46.6 | +3.3 |
| | Conservative | David Evans | 12,171 | 38.5 | −2.6 |
| | Labour | Edward Llewellyn-Jones | 3,304 | 10.5 | +1.9 |
| | Plaid Cymru | Carl Clowes | 1,412 | 4.5 | −0.8 |
| Majority | Majority | Majority | 2,558 | 8.1 | +5.9 |
| Turnout | Turnout | Turnout | 31,616 | 79.4 | +0.2 |
| Registered electors | Registered electors | Registered electors | 39,808 | | |
| | Liberal hold | Liberal hold | Swing | | |

#### Elections in the 1990s

General election 1992: Montgomery :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal Democrats | Alex Carlile | 16,031 | 48.5 | +1.9 |
| | Conservative | Jeannie France-Hayhurst | 10,822 | 32.7 | −5.8 |
| | Labour | Stephen Wood | 4,115 | 12.4 | +1.9 |
| | Plaid Cymru | Hugh Parsons | 1,581 | 4.8 | +0.3 |
| | Green | Patrick Adams | 508 | 1.5 | N/A |
| Majority | Majority | Majority | 5,209 | 15.8 | +7.7 |
| Turnout | Turnout | Turnout | 33,057 | 79.9 | +0.5 |
| Registered electors | Registered electors | Registered electors | 41,386 | | |
| | Liberal Democrats hold | Liberal Democrats hold | Swing | | |
General election 1997: Montgomeryshire :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal Democrats | Lembit Öpik | 14,647 | 45.9 | −2.6 |
| | Conservative | Glyn Davies | 8,344 | 26.1 | −6.6 |
| | Labour | Angharad Davies | 6,109 | 19.1 | +6.7 |
| | Plaid Cymru | Helen Mary Jones | 1,608 | 5.0 | +0.2 |
| | Referendum | John Bufton | 879 | 2.8 | N/A |
| | Green | Susan Walker | 338 | 1.1 | −0.4 |
| Majority | Majority | Majority | 6,303 | 19.8 | +4.0 |
| Turnout | Turnout | Turnout | 31,925 | 74.7 | −5.2 |
| Registered electors | Registered electors | Registered electors | 60,873 | | |
| | Liberal Democrats hold | Liberal Democrats hold | Swing | +2.0 | |

### Elections in the 21st century
#### Elections in the 2000s

General election 2001: Montgomeryshire :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal Democrats | Lembit Öpik | 14,319 | 49.4 | +3.5 |
| | Conservative | David Jones | 8,085 | 27.9 | +1.8 |
| | Labour | Paul Davies | 3,443 | 11.9 | −7.2 |
| | Plaid Cymru | David Senior | 1,969 | 6.8 | +1.8 |
| | UKIP | David Rowlands | 786 | 2.7 | N/A |
| | ProLife Alliance | Ruth Davies | 210 | 0.7 | N/A |
| | Independent | Reginald Taylor | 171 | 0.6 | N/A |
| Majority | Majority | Majority | 6,234 | 21.5 | +1.7 |
| Turnout | Turnout | Turnout | 28,983 | 65.5 | −9.2 |
| Registered electors | Registered electors | Registered electors | 62,200 | | |
| | Liberal Democrats hold | Liberal Democrats hold | Swing | +0.9 | |
General election 2005: Montgomeryshire :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal Democrats | Lembit Öpik | 15,419 | 51.2 | +1.8 |
| | Conservative | Simon Baynes | 8,246 | 27.4 | −0.5 |
| | Labour | David Tinline | 3,454 | 11.5 | −0.4 |
| | Plaid Cymru | Ellen ap Gwynn | 2,078 | 6.9 | +0.1 |
| | UKIP | Clive Easton | 900 | 3.0 | +0.3 |
| Majority | Majority | Majority | 7,173 | 23.8 | +2.3 |
| Turnout | Turnout | Turnout | 30,097 | 64.4 | −1.1 |
| Registered electors | Registered electors | Registered electors | 46,766 | | |
| | Liberal Democrats hold | Liberal Democrats hold | Swing | +1.2 | |

#### Elections in the 2010s

General election 2010: Montgomeryshire :
| Party | Party | Candidate | Votes | % | ±% |
| | Conservative | Glyn Davies | 13,976 | 41.3 | +13.8 |
| | Liberal Democrats | Lembit Öpik | 12,792 | 37.8 | −13.4 |
| | Plaid Cymru | Heledd Fychan | 2,802 | 8.3 | +1.3 |
| | Labour | Nick Colbourne | 2,407 | 7.1 | −5.2 |
| | UKIP | David W. L. Rowlands | 1,128 | 3.3 | +0.4 |
| | National Front | Milton Ellis | 384 | 1.1 | N/A |
| | Independent | Bruce Lawson | 324 | 1.0 | N/A |
| Majority | Majority | Majority | 1,184 | 3.5 | N/A |
| Turnout | Turnout | Turnout | 33,813 | 69.4 | +3.1 |
| Registered electors | Registered electors | Registered electors | 48,730 | | |
| | Conservative gain from Liberal Democrats | Conservative gain from Liberal Democrats | Swing | +13.2 | |
Note: The David Rowlands who stood here is different from the David Rowlands who stood in Newport East at this election for UKIP.
General election 2015: Montgomeryshire :
| Party | Party | Candidate | Votes | % | ±% |
| | Conservative | Glyn Davies | 15,204 | 45.0 | +3.7 |
| | Liberal Democrats | Jane Dodds | 9,879 | 29.3 | −8.5 |
| | UKIP | Des Parkinson | 3,769 | 11.2 | +7.9 |
| | Labour | Martyn Singleton | 1,900 | 5.6 | −1.5 |
| | Plaid Cymru | Ann Griffith | 1,745 | 5.2 | −3.1 |
| | Green | Richard Chaloner | 1,260 | 3.7 | N/A |
| Majority | Majority | Majority | 5,325 | 15.7 | +12.2 |
| Turnout | Turnout | Turnout | 33,757 | 69.3 | −0.1 |
| Registered electors | Registered electors | Registered electors | 48,690 | | |
| | Conservative hold | Conservative hold | Swing | +6.2 | |
General election 2017: Montgomeryshire :
| Party | Party | Candidate | Votes | % | ±% |
| | Conservative | Glyn Davies | 18,075 | 51.8 | +6.8 |
| | Liberal Democrats | Jane Dodds | 8,790 | 25.2 | −4.1 |
| | Labour | Iwan Wyn Jones | 5,542 | 15.9 | +10.3 |
| | Plaid Cymru | Aled Morgan Hughes | 1,960 | 5.6 | +0.4 |
| | Green | Richard Chaloner | 524 | 1.5 | −2.2 |
| Majority | Majority | Majority | 9,285 | 26.6 | +10.9 |
| Turnout | Turnout | Turnout | 34,891 | 70.1 | +0.8 |
| Registered electors | Registered electors | Registered electors | 50,755 | | |
| | Conservative hold | Conservative hold | Swing | +5.5 | |
General election 2019: Montgomeryshire :
| Party | Party | Candidate | Votes | % | ±% |
| | Conservative | Craig Williams | 20,020 | 58.5 | +6.7 |
| | Liberal Democrats | Kishan Devani | 7,882 | 23.0 | −2.2 |
| | Labour | Kait Duerden | 5,585 | 16.3 | +0.4 |
| | Gwlad Gwlad | Gwyn Evans | 727 | 2.1 | N/A |
| Rejected ballots | Rejected ballots | Rejected ballots | 213 | | |
| Majority | Majority | Majority | 12,138 | 35.5 | +8.9 |
| Turnout | Turnout | Turnout | 34,214 | 69.8 | −0.3 |
| Registered electors | Registered electors | Registered electors | 48,997 | | |
| | Conservative hold | Conservative hold | Swing | +4.4 | |
Of the 213 rejected ballots:
* 156 were either unmarked or it was uncertain who the vote was for.
* 24 voted for more than one candidate.
* 33 had want of official mark.