# Derby (UK Parliament constituency)

Derby is a former United Kingdom Parliamentary constituency. It was a constituency of the House of Commons of the Parliament of England, then of the Parliament of Great Britain from 1707 to 1800 and of the Parliament of the United Kingdom from 1801 to 1950. It was represented by two members of parliament. It was divided into the single-member constituencies of Derby North and Derby South in 1950.

## History

Derby regularly sent two representatives to Parliament from Edward I's reign. In 1900 it was one of the first two constituencies to elect a member from the then newly formed Labour Party, along with Merthyr Tydfil.
In 1950 the constituency was abolished and replaced by the two single-member constituencies of Derby North and Derby South.

## Boundaries

1885–1918: The existing parliamentary borough, and so much of the municipal borough of Derby as was not already included in the parliamentary borough.

## Members of Parliament
### 1294–1640

| Parliament | First member | Second member |
| 1294 | William de la Cornere | Randalph Makeneye |
| 1297 | William Bourne de Derby | Nicklos de Lorimer |
| 1299 | Nicklos de Lorimer | Gervase de Derby |
| 1301 | Gervase de Wilnye | Adam le Rede |
| 1304 | John de la Corne | Richard Cardoyl |
| 1305 | John de Chaddesdon | Gervase de Wileyne |
| 1306 | Hugh Alibon | Peter la Chapman |
| 1307 | John Chaddesdon | Gervase de Wilney |
| 1310 | Henry Alwaston | Thomas de Stade |
| 1311 | Thomas del Sted | Henry Bindetton |
| 1312 | Geffry de Leycestre | Robert de Breydsale |
| 1313 | John Fitz John | Henry Lomb |
| 1314 | Adam le Rede | William de Aleby |
| 1314 | William de Aleby | Adam le Rede |
| 1318 | Simon de Chester | Richard Breddon |
| 1318 | Alexander de Holand | John de Weston |
| 1325 | Henry le Carpenter | John Fitz Richard |
| 1327 | John Fitz Gilbert | Ferhun Tutbury |
| 1328 | Simon de Chester | John Collings |
| 1328 | Thomas Tulaxbar | Geffry Snayth |
| 1330 | Simon de Nottingham | John de Weston |
| 1333 | Hugh Allibon | John Gibbonson |
| 1334 | John Gibbonson | ? |
| 1335 | Nicholas Langford | John Fitz Thomas |
| 1336 | Simon de Chester | John Gibbonson |
| 1337 | John Fitz William | Thomas Tuttebury |
| 1338 | William de Derby | John Hache | Robert Allibon |
| 1338 | William de Derby | Robert de Weston |
| 1338 | Simon de Chester | Robert Allibon |
| 1338 | Henry del Howe | Robert Saundry |
| 1339 | Alexander Holland | John Weston |
| 1339 | John Gibbonson | Thomas Preston |
| 1339 | Thomas Tutbury | Thomas Thurmondsley |
| 1341 | Thomas de Tutbury | Thomas Derby |
| 1341 | Richard de Trowell | Peter de Quarndon |
| 1342 | Simon de Nottingham | Thomas de Derby |
| 1344 | William de Nottingham | Simon de Chester |
| 1348 | William de Chaddesdon | Thomas de Tutbury |
| 1350 | William Gilbert | John de Chaddesdon |
| 1351 | Thomas Tutbury | William de Derby |
| 1354 | William Chester | Richard Chelford |
| 1355 | Thomas Tutbury | Henry Diddound |
| 1355 | Edmund Toucher | John Bech |
| 1356 | William Ennington | William Nayle |
| 1358 | William de Chester | William Nayle |
| 1361 | Peter Prentice | William de Rossington |
| 1362 | Peter Prentice | William de Rossington |
| 1363 | John Trowell | John Weeke |
| 1364 | John Bradon | Robert Allibon |
| 1365 | William Chester | John Gilbert |
| 1366 | John Berd | William Sese |
| 1369 | John de Brakkerley | William Glasyere |
| 1370 | John Preest | John de Brakkerley |
| 1372 | John Trowell | ? |
| 1373 | William Chester | John Gilbert |
| 1374 | William Pakeman | Roger Allibon |
| 1377 | William Groos | John de Berdee |
| 1378 | John Hay | Richard de Trowell |
| 1378 | Henry Flanstead | Roger Allibon |
| 1379 | Richard Dell | Roger Ashe |
| 1382 | Thomas Toppeleyse | John Hay |
| 1383 | William Pakeman | John Bowyer |
| 1383 | Richard de Trowell | John Gibbon |
| 1384 | Richard Sherman | John de Stockes |
| 1385 | Richard Trowell | John Dell |
| 1386 | John Stokkes | John Prentice I |
| 1388 (Feb) | William Pakeman | Thomas Tappely |
| 1388 (Sep) | William Pakeman | Hugh Adam |
| 1390 (Jan) | John Stokkes | John Hay |
| 1390 (Nov) | |
| 1391 | Richard Sherman | Thomas Docking |
| 1393 | John Stokkes | Richard Trowell |
| 1394 | |
| 1395 | John Stokkes | William Groos |
| 1397 (Jan) | William Groos | Thomas Shore |
| 1397 (Sep) | William Groos | Thomas Shore |
| 1399 | John Stokkes | Thomas Docking |
| 1401 | |
| 1402 | Elias Stokkes | Richard Trowell |
| 1404 (Jan) | |
| 1404 (Oct) | John Prentice II | John Stokkes |
| 1406 | Thomas Goldsmith | John Fairclough |
| 1407 | |
| 1410 | |
| 1411 | John Brasier | Thomas Shore |
| 1413 (Feb) | |
| 1413 (May) | Elias Stokkes |
| 1414 (Apr) | John Prentice II | Robert Bolton |
| 1414 (Nov) | Elias Stokkes | Thomas Ridgeway |
| 1415 |
| 1416 (Mar) | Elias Stokkes | Roger Wolley |
| 1416 (Oct) | |
| 1417 | Robert Ireland | Thomas Steppingstones |
| 1419 | John Sparham | Ralph Shore |
| 1420 | Richard Brown | Robert Smith |
| 1421 (May) | Ralph Shore | Thomas Stokkes |
| 1421 (Dec) | Ralph Shore | John Spicer |
| 1422 | John Stokes | John Barker |
| 1423 | John de Both | Elias Dell |
| 1424 | John Stokes | Elias Dell |
| 1425 | Roger Wolley | Henry Crabbe |
| 1427 | Nicholas Meysham | John de Stokkys |
| 1429 | John de Bath | Elias Stokkys |
| 1430 | Thomas Stokkes | Robert Smith |
| 1432 | John Booth | Robert Sutton |
| 1434 | John Bothe | Thomas Stokeys |
| 1436 | Thomas Stokks | Elias Tildesley |
| 1441 | Thomas Stokkys | Henry Spicer |
| 1446 | Thomas Chatley | Robert Mundy |
| 1448 | Thomas Chatterley | John Spicer |
| 1449 | Richard Chitterley | Thomas Chitterley |
| 1450 | Thomas Acard | Thomas Bradshawe |
| 1454 | John Bird | Edward Lovel |
| 1459 | John Bird | William Hunter |
| 1468 | Thomas Bakynton | Thomas Allestre |
| 1473 | John Newton | Roger Wilkinson |
| 1478 | John Briddle | John Newton |
| 1510–1523 | No names known |
| 1529 | Thomas Ward | Henry Ainsworth |
| 1536 | ? |
| 1539 | ? |
| 1542 | Thomas Sutton | William Allestry |
| 1545 | Thomas Sutton | William Allestry |
| 1547 | Thomas Sutton | Robert Ragg |
| 1553 (Mar) | Robert Ragg | William Allestry |
| 1553 (Oct) | Thomas Sutton | George Cherneley |
| 1554 (Apr) | William Allestry | George Stringer |
| 1554 (Nov) | William More | William Bainbridge |
| 1555 | Richard Ward | William Allestry |
| 1558 | James Thatcher | William Bainbridge |
| 1558–9 | Richard Doughty | William Bainbridge |
| 1562–3 | William More | William Bainbridge |
| 1571 | Robert Stringer | William Bainbridge |
| 1572 | Robert Stringer | Tristram Tyrwhitt, expelled and repl. 1576 by Robert Bainbridge |
| 1584 | Sir Henry Beaumont | William Botham |
| 1586 (Sep) | William Botham | Robert Bainbridge |
| 1588–9 | Richard Fletcher | William Botham |
| 1593 | Robert Stringer | William Botham |
| 1597 | Henry Duport | Robert Stringer |
| 1601 (Oct) | Peter Eure | John Baxter |
| 1604–1611 | John Baxter | Edward Sleighe |
| 1614 | Gilbert Kniveton | Arthur Turnor |
| 1621–1622 | Timothy Leeving | Edward Leech |
| 1624 | Timothy Leeving | Sir Edward Leech |
| 1625 | Timothy Leeving | Sir Edward Leech |
| 1626 | Sir Henry Crofts | John Thoroughgood |
| 1628–1629 | Philip Mainwaring | Timothy Leeving |
| 1629–1640 | No Parliaments summoned | No Parliaments summoned |

### 1640–1950

| Year | Year | Year | First member | First party | Second member | Second party |
| | | November 1640 | William Allestry | Royalist | Nathaniel Hallowes | Parliamentarian |
| | | October 1643 | Allestry disabled to sit – seat vacant | Allestry disabled to sit – seat vacant | | Nathaniel Hallowes | Parliamentarian |
| | | 1645 | Thomas Gell | | Nathaniel Hallowes | Parliamentarian |
| | | December 1648 | Gell excluded in Pride's Purge – seat vacant | Gell excluded in Pride's Purge – seat vacant | | Nathaniel Hallowes | Parliamentarian |
| | | 1653 | Derby was unrepresented in the Barebones Parliament | Derby was unrepresented in the Barebones Parliament | Derby was unrepresented in the Barebones Parliament | Derby was unrepresented in the Barebones Parliament |
| | | 1654 | Gervase Bennet | | Derby had only one seat in the First and Second Parliaments of the Protectorate | Derby had only one seat in the First and Second Parliaments of the Protectorate |
| | | January 1659 | Gervase Bennet | | John Dalton | |
| | | May 1659 | Nathaniel Hallowes | | One seat vacant | One seat vacant |
| | | April 1660 | Roger Allestry | | John Dalton | |
| | | 1665 | Anchitell Grey | | John Dalton | |
| | | 1679 | Anchitell Grey | | George Vernon | |
| | | 1685 | William Allestry | | John Coke | |
| | | 1689 | Anchitell Grey | | John Coke | |
| | | 1690 | Anchitell Grey | | Robert Wilmot | |
| | | 1695 | Lord Henry Cavendish | | John Bagnold | |
| | | 1698 | Lord Henry Cavendish | | George Vernon | |
| | | 1701 | Lord James Cavendish | | Sir Charles Pye | |
| | | 1701 | Lord James Cavendish | | John Harpur | |
| | | 1702 | Thomas Stanhope | | John Harpur | |
| | | 1705 | Lord James Cavendish | | Sir Thomas Parker | Whig |
| | | 1710 | Lord James Cavendish | | Richard Pye | |
| | | 1710 | Sir Richard Levinge | | John Harpur | |
| | | 1711 | Edward Mundy | | John Harpur | |
| | | 1713 | Edward Mundy | | Nathaniel Curzon | |
| | | 1715 | Lord James Cavendish | | William Stanhope | Whig |
| | | 1722 | Lord James Cavendish | | Thomas Bayley | |
| | | 1727 | Lord James Cavendish | | William Stanhope | Whig |
| | | 1730 | Lord James Cavendish | | Charles Stanhope | |
| | | 1736 | Lord James Cavendish | | John Stanhope | |
| | | 1742 | Viscount Duncannon | | John Stanhope | |
| | | 1748 | Viscount Duncannon | | Thomas Rivett | |
| | | 1754 | Lord Frederick Cavendish | Whig | George Venables-Vernon | |
| | | 1762 | Lord Frederick Cavendish | Whig | William Fitzherbert | |
| | | 1772 | Lord Frederick Cavendish | Whig | Wenman Coke | Whig |
| | | 1775 | Lord Frederick Cavendish | Whig | John Gisborne | Whig |
| | | 1776 | Lord Frederick Cavendish | Whig | Daniel Coke | Tory |
| | | 1780 | Lord George Cavendish | Whig | Edward Coke | Whig |
| | | 1797 | George Walpole | Whig | Edward Coke | Whig |
| | | 1806 | William Cavendish | Whig | Edward Coke | Whig |
| | | 1807 | William Cavendish | Whig | Thomas Coke | Whig |
| | | 1807 | William Cavendish | Whig | Edward Coke | Whig |
| | | 1812 | Henry Cavendish | Whig | Edward Coke | Whig |
| | | 1818 | Henry Cavendish | Whig | Thomas William Coke | Whig |
| | | 1826 | Henry Cavendish | Whig | Samuel Crompton | Whig |
| | | 1830 | Henry Cavendish | Whig | Edward Strutt | Whig |
| | | 1835 | John Ponsonby | Whig | Edward Strutt | Whig |
| | | 1847 | Hon. Frederick Leveson-Gower | Whig | Edward Strutt | Whig |
| | | 1848 | Michael Thomas Bass | Radical | Lawrence Heyworth | Radical |
| | | 1852 | Michael Thomas Bass | Radical | Thomas Horsfall | Conservative |
| | | 1853 | Michael Thomas Bass | Radical | Lawrence Heyworth | Radical |
| | | 1857 | Michael Thomas Bass | Radical | Samuel Beale | Radical |
| | | 1859 | Michael Thomas Bass | Liberal | Samuel Beale | Liberal |
| | | 1865 | Michael Thomas Bass | Liberal | William Thomas Cox | Conservative |
| | | 1868 | Michael Thomas Bass | Liberal | Samuel Plimsoll | Liberal |
| | | 1880 | Michael Thomas Bass | Liberal | Sir William Vernon-Harcourt | Liberal |
| | | 1883 | Thomas Roe | Liberal | Sir William Vernon-Harcourt | Liberal |
| | | 1895 | Sir Henry Howe Bemrose | Conservative | Geoffrey Drage | Conservative |
| | | 1900 | Sir Thomas Roe | Liberal | Richard Bell | Labour |
| | | 1904 | Sir Thomas Roe | Liberal | Richard Bell | Liberal |
| | | 1910 | Sir Thomas Roe | Liberal | J. H. Thomas | Labour |
| | | 1916 | Sir William Job Collins | Liberal | J. H. Thomas | Labour |
| | | 1918 | Albert Green | Conservative | J. H. Thomas | Labour |
| | | 1922 | Charles Roberts | Liberal | J. H. Thomas | Labour |
| | | 1923 | William Raynes | Labour | J. H. Thomas | Labour |
| | | 1924 | Sir Richard Luce | Conservative | J. H. Thomas | Labour |
| | | 1929 | William Raynes | Labour | J. H. Thomas | Labour |
| | | 1931 | William Allan Reid | Conservative | J. H. Thomas | National Labour |
| | | 1936 | William Allan Reid | Conservative | Philip Noel-Baker | Labour |
| | | 1945 | Clifford Wilcock | Labour | Philip Noel-Baker | Labour |
| 1950 | 1950 | 1950 | Constituency split into North and South seats | Constituency split into North and South seats | Constituency split into North and South seats | Constituency split into North and South seats |

## Elections
### Elections in the 1830s

General election 1830: Derby (2 seats) :
| Party | Party | Candidate | Votes | % | ±% |
| | Whig | Henry Cavendish | Unopposed | Unopposed | Unopposed |
| | Whig | Edward Strutt | Unopposed | Unopposed | Unopposed |
| Registered electors | Registered electors | Registered electors | c. 650 | | |
| | Whig hold | Whig hold | Whig hold | Whig hold | Whig hold |
| | Whig hold | Whig hold | Whig hold | Whig hold | Whig hold |
General election 1831: Derby (2 seats) :
| Party | Party | Candidate | Votes | % | ±% |
| | Whig | Henry Cavendish | Unopposed | Unopposed | Unopposed |
| | Whig | Edward Strutt | Unopposed | Unopposed | Unopposed |
| Registered electors | Registered electors | Registered electors | c. 650 | | |
| | Whig hold | Whig hold | Whig hold | Whig hold | Whig hold |
| | Whig hold | Whig hold | Whig hold | Whig hold | Whig hold |
General election 1832: Derby (2 seats) :
| Party | Party | Candidate | Votes | % | ±% |
| | Whig | Edward Strutt | 884 | 43.5 | N/A |
| | Whig | Henry Cavendish | 716 | 35.3 | N/A |
| | Tory | Charles Henry Colvile | 430 | 21.2 | New |
| Majority | Majority | Majority | 286 | 14.1 | N/A |
| Turnout | Turnout | Turnout | 1,136 | 82.1 | N/A |
| Registered electors | Registered electors | Registered electors | 1,384 | | |
| | Whig hold | Whig hold | Swing | N/A | |
| | Whig hold | Whig hold | Swing | N/A | |
General election 1835: Derby (2 seats) :
| Party | Party | Candidate | Votes | % | ±% |
| | Whig | Edward Strutt | 903 | 42.0 | −1.5 |
| | Whig | John Ponsonby | 724 | 33.6 | −1.7 |
| | Conservative | Francis Curzon | 525 | 24.4 | +3.2 |
| Majority | Majority | Majority | 199 | 9.2 | −4.9 |
| Turnout | Turnout | Turnout | c. 1,076 | c. 72.8 | c. +9.3 |
| Registered electors | Registered electors | Registered electors | 1,478 | | |
| | Whig hold | Whig hold | Swing | −1.6 | |
| | Whig hold | Whig hold | Swing | −1.7 | |
General election 1837: Derby (2 seats) :
| Party | Party | Candidate | Votes | % | ±% |
| | Whig | Edward Strutt | 836 | 32.1 | −9.9 |
| | Whig | John Ponsonby | 791 | 30.3 | −3.3 |
| | Conservative | Francis Curzon | 525 | 20.1 | +7.9 |
| | Conservative | Charles Robert Colvile | 456 | 17.5 | +5.3 |
| Majority | Majority | Majority | 266 | 10.2 | +1.0 |
| Turnout | Turnout | Turnout | 1,318 | 75.3 | c. +2.5 |
| Registered electors | Registered electors | Registered electors | 1,751 | | |
| | Whig hold | Whig hold | Swing | −8.3 | |
| | Whig hold | Whig hold | Swing | −5.0 | |

### Elections in the 1840s

General election 1841: Derby (2 seats) :
| Party | Party | Candidate | Votes | % | ±% |
| | Whig | Edward Strutt | 875 | 39.0 | +6.9 |
| | Whig | John Ponsonby | 784 | 34.9 | +4.6 |
| | Conservative | Edward Sacheverell Chandos Pole | 587 | 26.1 | −11.5 |
| Majority | Majority | Majority | 197 | 8.8 | −1.4 |
| Turnout | Turnout | Turnout | 1,377 | 72.2 | −3.1 |
| Registered electors | Registered electors | Registered electors | 1,906 | | |
| | Whig hold | Whig hold | Swing | +6.3 | |
| | Whig hold | Whig hold | Swing | +5.2 | |
Strutt was appointed Chief Commissioner of Railways, requiring a by-election.
By-election, 4 September 1846: Derby :
| Party | Party | Candidate | Votes | % | ±% |
| | Whig | Edward Strutt | 835 | 59.9 | −14.0 |
| | Conservative | Digby Mackworth | 559 | 40.1 | +14.0 |
| Majority | Majority | Majority | 276 | 19.8 | +11.0 |
| Turnout | Turnout | Turnout | 1,394 | 68.9 | −3.3 |
| Registered electors | Registered electors | Registered electors | 2,022 | | |
| | Whig hold | Whig hold | Swing | −14.0 | |
Ponsonby succeeded to the peerage, becoming 5th Earl of Bessborough, causing a by-election.
By-election, 16 June 1847: Derby :
| Party | Party | Candidate | Votes | % | ±% |
| | Whig | Frederick Leveson-Gower | Unopposed | Unopposed | Unopposed |
| | Whig hold | Whig hold | Whig hold | Whig hold | Whig hold |
General election 1847: Derby (2 seats) :
| Party | Party | Candidate | Votes | % | ±% |
| | Whig | Edward Strutt | 881 | 31.8 | −7.2 |
| | Whig | Frederick Leveson-Gower | 852 | 30.8 | −4.1 |
| | Conservative | Henry Raikes | 820 | 29.6 | +3.5 |
| | Chartist | Philip McGrath | 216 | 7.8 | New |
| Majority | Majority | Majority | 32 | 1.2 | −7.6 |
| Turnout | Turnout | Turnout | 1,385 | 63.6 | −8.6 |
| Registered electors | Registered electors | Registered electors | 2,177 | | |
| | Whig hold | Whig hold | Swing | −4.5 | |
| | Whig hold | Whig hold | Swing | −2.9 | |
The election was declared void on petition due to bribery and treating by Strutt's and Leveson-Gower's agents, and the writ suspended in March 1848, later causing a by-election.
By-election, 2 September 1848: Derby (2 seats) :
| Party | Party | Candidate | Votes | % | ±% |
| | Radical | Michael Thomas Bass | 956 | 28.1 | −3.7 |
| | Radical | Lawrence Heyworth | 912 | 26.8 | −4.0 |
| | Conservative | James William Freshfield | 778 | 22.8 | +8.0 |
| | Conservative | James Lord | 760 | 22.3 | +7.5 |
| Majority | Majority | Majority | 134 | 4.0 | N/A |
| Turnout | Turnout | Turnout | 1,703 (est) | 78.2 (est) | +14.6 |
| Registered electors | Registered electors | Registered electors | 2,177 | | |
| | Radical gain from Whig | Radical gain from Whig | Swing | −5.7 | |
| | Radical gain from Whig | Radical gain from Whig | Swing | −5.9 | |

### Elections in the 1850s

General election 1852: Derby (2 seats) :
| Party | Party | Candidate | Votes | % | ±% |
| | Radical | Michael Thomas Bass | 1,252 | 38.0 | +6.2 |
| | Conservative | Thomas Horsfall | 1,025 | 31.1 | +1.5 |
| | Radical | Lawrence Heyworth | 1,018 | 30.9 | +0.1 |
| Turnout | Turnout | Turnout | 2,160 (est) | 88.2 (est) | +24.6 |
| Registered electors | Registered electors | Registered electors | 2,448 | | |
| Majority | Majority | Majority | 227 | 6.9 | N/A |
| | Radical gain from Whig | Radical gain from Whig | Swing | +2.7 | |
| Majority | Majority | Majority | 7 | 0.2 | N/A |
| | Conservative gain from Whig | Conservative gain from Whig | Swing | −3.9 | |
Horsfall's election was in March 1853 declared void due to bribery, and Heyworth was declared elected in his place.
General election 1857: Derby (2 seats) :
| Party | Party | Candidate | Votes | % | ±% |
| | Radical | Michael Thomas Bass | 884 | 40.9 | +2.9 |
| | Radical | Samuel Beale | 846 | 39.2 | +8.3 |
| | Conservative | William Forbes Mackenzie | 430 | 19.9 | −11.2 |
| Majority | Majority | Majority | 416 | 19.3 | +12.4 |
| Turnout | Turnout | Turnout | 1,295 (est) | 52.2 (est) | −36.0 |
| Registered electors | Registered electors | Registered electors | 2,479 | | |
| | Radical hold | Radical hold | Swing | +4.3 | |
| | Radical gain from Conservative | Radical gain from Conservative | Swing | +7.0 | |
General election 1859: Derby (2 seats) :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal | Michael Thomas Bass | 1,260 | 35.5 | −5.4 |
| | Liberal | Samuel Beale | 902 | 25.4 | −13.8 |
| | Liberal | William Milbourne James | 736 | 20.8 | N/A |
| | Conservative | Henry Cecil Raikes | 648 | 18.3 | −1.6 |
| Majority | Majority | Majority | 166 | 4.6 | −14.7 |
| Turnout | Turnout | Turnout | 1,773 (est) | 70.6 (est) | +18.4 |
| Registered electors | Registered electors | Registered electors | 2,513 | | |
| | Liberal hold | Liberal hold | Swing | −2.3 | |
| | Liberal hold | Liberal hold | Swing | −6.5 | |

### Elections in the 1860s

General election 1865: Derby (2 seats) :
| Party | Party | Candidate | Votes | % | ±% |
| | Conservative | William Thomas Cox | 1,096 | 31.7 | +13.4 |
| | Liberal | Michael Thomas Bass | 1,063 | 30.7 | +5.3 |
| | Liberal | Samuel Plimsoll | 691 | 20.0 | −0.8 |
| | Liberal | Samuel Beale | 608 | 17.6 | −7.8 |
| Majority | Majority | Majority | 488 | 14.1 | N/A |
| Turnout | Turnout | Turnout | 2,277 (est) | 92.9 (est) | +22.3 |
| Registered electors | Registered electors | Registered electors | 2,450 | | |
| | Conservative gain from Liberal | Conservative gain from Liberal | Swing | +7.3 | |
| | Liberal hold | Liberal hold | Swing | −4.1 | |
General election 1868: Derby (2 seats) :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal | Michael Thomas Bass | 4,995 | 41.1 | +10.4 |
| | Liberal | Samuel Plimsoll | 4,677 | 38.4 | +18.4 |
| | Conservative | William Thomas Cox | 2,492 | 20.5 | −11.2 |
| Majority | Majority | Majority | 2,185 | 17.9 | N/A |
| Turnout | Turnout | Turnout | 7,328 (est) | 75.0 (est) | −17.9 |
| Registered electors | Registered electors | Registered electors | 9,777 | | |
| | Liberal gain from Conservative | Liberal gain from Conservative | Swing | +8.0 | |
| | Liberal hold | Liberal hold | Swing | +12.0 | |

### Elections in the 1870s

General election 1874: Derby (2 seats) :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal | Michael Thomas Bass | 5,579 | 39.4 | −1.7 |
| | Liberal | Samuel Plimsoll | 4,938 | 34.9 | −3.5 |
| | Conservative | William Thomas Cox | 3,642 | 25.7 | +5.2 |
| Majority | Majority | Majority | 1,296 | 9.2 | −8.7 |
| Turnout | Turnout | Turnout | 8,901 (est) | 78.7 (est) | +3.7 |
| Registered electors | Registered electors | Registered electors | 11,316 | | |
| | Liberal hold | Liberal hold | Swing | −2.2 | |
| | Liberal hold | Liberal hold | Swing | −3.1 | |

### Elections in the 1880s

General election 1880: Derby (2 seats) :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal | Michael Thomas Bass | 8,864 | 45.8 | +6.4 |
| | Liberal | Samuel Plimsoll | 7,758 | 40.1 | +5.2 |
| | Conservative | Thomas Collins | 2,730 | 14.1 | −11.6 |
| Majority | Majority | Majority | 5,028 | 26.0 | +16.8 |
| Turnout | Turnout | Turnout | 11,594 (est) | 89.1 (est) | +10.4 |
| Registered electors | Registered electors | Registered electors | 13,006 | | |
| | Liberal hold | Liberal hold | Swing | +6.1 | |
| | Liberal hold | Liberal hold | Swing | +5.5 | |
Plimsoll's resignation caused a by-election.
By-election, 26 May 1880: Derby (1 seat) :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal | William Harcourt | Unopposed | Unopposed | Unopposed |
| | Liberal hold | Liberal hold | Liberal hold | Liberal hold | Liberal hold |
Bass' resignation caused a by-election.
By-election, 12 Jun 1883: Derby (1 seat) :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal | Thomas Roe | Unopposed | Unopposed | Unopposed |
| | Liberal hold | Liberal hold | Liberal hold | Liberal hold | Liberal hold |
General election 1885: Derby (2 seats) :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal | Thomas Roe | 7,813 | 36.1 | −9.7 |
| | Liberal | William Harcourt | 7,630 | 35.3 | −4.8 |
| | Conservative | William Brown Hextall | 4,943 | 22.8 | +8.7 |
| | Independent Liberal | Alfred Stace Dyer | 1,251 | 5.8 | New |
| Majority | Majority | Majority | 2,687 | 12.5 | −13.5 |
| Turnout | Turnout | Turnout | 12,868 | 86.2 | −2.9 (est) |
| Registered electors | Registered electors | Registered electors | 14,925 | | |
| | Liberal hold | Liberal hold | Swing | −9.2 | |
| | Liberal hold | Liberal hold | Swing | −6.8 | |
Harcourt's appointment as Chancellor of the Exchequer caused a by-election.
By-election, 9 Feb 1886: Derby (1 seat) :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal | William Harcourt | Unopposed | Unopposed | Unopposed |
| | Liberal hold | Liberal hold | Liberal hold | Liberal hold | Liberal hold |
General election 1886: Derby (2 seats) :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal | Thomas Roe | 6,571 | 37.8 | +1.7 |
| | Liberal | William Harcourt | 6,431 | 37.1 | +1.8 |
| | Liberal Unionist | William Evans | 4,346 | 25.1 | +2.3 |
| Majority | Majority | Majority | 2,085 | 12.0 | −0.5 |
| Turnout | Turnout | Turnout | 10,758 | 72.1 | −14.1 |
| Registered electors | Registered electors | Registered electors | 14,925 | | |
| | Liberal hold | Liberal hold | Swing | +0.3 | |
| | Liberal hold | Liberal hold | Swing | +0.3 | |

### Elections in the 1890s

General election 1892: Derby (2 seats) :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal | William Harcourt | 7,507 | 29.1 | −8.7 |
| | Liberal | Thomas Roe | 7,389 | 28.6 | −8.5 |
| | Conservative | William Brown Hextall | 5,546 | 21.5 | New |
| | Liberal Unionist | Alfred Seale Haslam | 5,363 | 20.8 | −4.3 |
| Majority | Majority | Majority | 1,843 | 7.1 | −4.9 |
| Turnout | Turnout | Turnout | 12,903 | 83.6 | +11.5 |
| Registered electors | Registered electors | Registered electors | 15,754 | | |
| | Liberal hold | Liberal hold | Swing | −2.2 | |
| | Liberal hold | Liberal hold | Swing | −2.1 | |
Harcourt's appointment as Chancellor of the Exchequer requires a by-election.
1892 Derby by-election :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal | William Harcourt | 6,508 | 80.1 | +22.4 |
| | Independent | Henry Farmer-Atkinson | 1,619 | 19.9 | New |
| Majority | Majority | Majority | 4,889 | 60.2 | +53.1 |
| Turnout | Turnout | Turnout | 8,127 | 51.6 | −32.0 |
| Registered electors | Registered electors | Registered electors | 15,754 | | |
| | Liberal hold | Liberal hold | Swing | | |
General election 1895: Derby (2 seats) :
| Party | Party | Candidate | Votes | % | ±% |
| | Conservative | Henry Howe Bemrose | 7,907 | 28.0 | +6.5 |
| | Conservative | Geoffrey Drage | 7,076 | 25.1 | +4.3 |
| | Liberal | William Harcourt | 6,785 | 24.0 | −5.1 |
| | Liberal | Thomas Roe | 6,475 | 22.9 | −5.7 |
| Majority | Majority | Majority | 291 | 1.1 | N/A |
| Turnout | Turnout | Turnout | 14,122 | 82.8 | −0.8 |
| Registered electors | Registered electors | Registered electors | 17,379 | | |
| | Conservative gain from Liberal | Conservative gain from Liberal | Swing | +5.8 | |
| | Conservative gain from Liberal | Conservative gain from Liberal | Swing | +4.7 | |

### Elections in the 1900s

General election 1900: Derby (2 seats) :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal | Thomas Roe | 7,922 | 26.6 | −20.3'"`UNIQ−−ref−000000DA−QINU`"' |
| | Labour Repr. Cmte. | Richard Bell | 7,640 | 25.7 | New |
| | Conservative | Henry Howe Bemrose | 7,397 | 24.9 | −3.1 |
| | Conservative | Geoffrey Drage | 6,775 | 22.8 | −2.3 |
| Turnout | Turnout | Turnout | 29,734 | 84.5 | +1.7 |
| Registered electors | Registered electors | Registered electors | 18,270 | | |
| Majority | Majority | Majority | 525 | 1.7 | N/A |
| | Liberal gain from Conservative | Liberal gain from Conservative | Swing | | |
| Majority | Majority | Majority | 865 | 3.8 | N/A |
| | Labour Repr. Cmte. gain from Conservative | Labour Repr. Cmte. gain from Conservative | Swing | | |
General election 1906: Derby (2 seats) :
| Party | Party | Candidate | Votes | % | ±% |
| | Lib-Lab | Richard Bell | 10,361 | 31.0 | +5.3 |
| | Liberal | Thomas Roe | 10,239 | 30.6 | +4.0 |
| | Conservative | James Henry Edward Holford | 6,421 | 19.2 | −5.7 |
| | Conservative | Edward George Spencer Churchill | 6,409 | 19.2 | −3.6 |
| Turnout | Turnout | Turnout | 33,430 | 87.6 | +3.1 |
| Registered electors | Registered electors | Registered electors | 19,543 | | |
| Majority | Majority | Majority | 3,818 | 11.4 | +9.7 |
| | Lib-Lab hold | Lib-Lab hold | Swing | +5.5 | |
| | Liberal hold | Liberal hold | Swing | +4.9 | |

### Elections in the 1910s

General election January 1910: Derby (2 seats) :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal | Thomas Roe | 10,343 | 28.3 | −2.3 |
| | Labour | J. H. Thomas | 10,189 | 27.9 | −3.1 |
| | Conservative | Arthur Edward Beck | 8,038 | 22.0 | +2.8 |
| | Conservative | Arthur Page | 7,953 | 21.8 | +2.6 |
| Turnout | Turnout | Turnout | 36,523 | 92.5 | +4.9 |
| Registered electors | Registered electors | Registered electors | 20,113 | | |
| Majority | Majority | Majority | 2,305 | 6.3 | −5.1 |
| | Liberal hold | Liberal hold | Swing | −2.6 | |
| Majority | Majority | Majority | 2,151 | 5.9 | N/A |
| | Labour gain from Lib-Lab | Labour gain from Lib-Lab | Swing | | |
General election December 1910: Derby (2 seats) :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal | Thomas Roe | 9,515 | 35.5 | +7.2 |
| | Labour | J. H. Thomas | 9,144 | 34.1 | +6.2 |
| | Conservative | Arthur Edward Beck | 8,160 | 30.4 | −13.4 |
| Turnout | Turnout | Turnout | 26,819 | 88.0 | −4.5 |
| Registered electors | Registered electors | Registered electors | 20,113 | | |
| Majority | Majority | Majority | 1,355 | 5.1 | −1.2 |
| | Liberal hold | Liberal hold | Swing | +10.3 | |
| Majority | Majority | Majority | 984 | 3.7 | −2.2 |
| | Labour hold | Labour hold | Swing | +9.8 | |
General Election 1914–15:
Another General Election was required to take place before the end of 1915. The political parties had been making preparations for an election to take place and by July 1914, the following candidates had been selected;
* Liberal: Raymond Asquith
* Labour: J. H. Thomas
* Unionist: Arthur Edward Beck
1916 Derby by-election :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal | William Collins | Unopposed | Unopposed | Unopposed |
| | Liberal hold | Liberal hold | Liberal hold | Liberal hold | Liberal hold |
General election 1918: Derby (2 seats) :
| Party | Party | Candidate | Votes | % | ±% |
| | Labour | J. H. Thomas | 25,145 | 37.8 | +3.7 |
| | Unionist | Albert Green | 14,920 | 22.4 | −8.0 |
| | Liberal | William Blews Rowbotham | 13,408 | 20.2 | −15.3 |
| | National Democratic | Harold Machin Smith | 13,012 | 19.6 | New |
| Turnout | Turnout | Turnout | 66,485 | 65.5 | −22.5 |
| Majority | Majority | Majority | 1,512 | 2.2 | N/A |
| | Unionist gain from Liberal | Unionist gain from Liberal | Swing | | |
| Majority | Majority | Majority | 11,737 | 17.6 | +13.9 |
| | Labour hold | Labour hold | Swing | | |

### Elections in the 1920s

General election 1922: Derby (2 seats) :
| Party | Party | Candidate | Votes | % | ±% |
| | Labour | Y J. H. Thomas | 25,215 | 27.0 | −10.8 |
| | Liberal | Y Charles Henry Roberts | 24,068 | 25.8 | +5.6 |
| | Unionist | Albert Green | 22,240 | 23.9 | +1.5 |
| | Labour | William Raynes | 21,677 | 23.3 | N/A |
| Turnout | Turnout | Turnout | 93,200 | 84.0 | +18.5 |
| Majority | Majority | Majority | 1,828 | 1.9 | N/A |
| | Liberal gain from Unionist | Liberal gain from Unionist | Swing | | |
| Majority | Majority | Majority | 2,975 | 3.1 | −14.5 |
| | Labour hold | Labour hold | Swing | | |
General election 1923: Derby (2 seats) :
| Party | Party | Candidate | Votes | % | ±% |
| | Labour | Y J. H. Thomas | 24,887 | 29.0 | +2.0 |
| | Labour | Y William Robert Raynes | 20,318 | 23.7 | +0.4 |
| | Unionist | Henry Fitz-Herbert Wright | 20,070 | 23.4 | −0.5 |
| | Liberal | Charles Henry Roberts | 10,669 | 12.5 | −13.3 |
| | Ind. Unionist | Thomas Clifford Newbold | 9,772 | 11.4 | New |
| Turnout | Turnout | Turnout | 85,716 | 81.1 | −2.9 |
| Majority | Majority | Majority | 9,649 | 11.2 | N/A |
| | Labour gain from Liberal | Labour gain from Liberal | Swing | +6.8 | |
General election 1924: Derby (2 seats) :
| Party | Party | Candidate | Votes | % | ±% |
| | Labour | Y J. H. Thomas | 27,423 | 25.7 | −3.3 |
| | Unionist | Y Richard Luce | 25,425 | 23.8 | +0.4 |
| | Labour | William Robert Raynes | 25,172 | 23.6 | −0.1 |
| | Unionist | Hilda Hulse | 21,700 | 20.3 | N/A |
| | Liberal | James Henderson-Stewart | 7,083 | 6.6 | −5.9 |
| Turnout | Turnout | Turnout | 99,720 | 85.2 | +4.1 |
| Majority | Majority | Majority | 5,723 | 5.4 | +5.1 |
| | Labour hold | Labour hold | Swing | | |
| Majority | Majority | Majority | 353 | 0.2 | N/A |
| | Unionist gain from Labour | Unionist gain from Labour | Swing | | |
General election 1929: Derby (2 seats) :
| Party | Party | Candidate | Votes | % | ±% |
| | Labour | YJ. H. Thomas | 39,688 | 30.0 | +4.3 |
| | Labour | YWilliam Robert Raynes | 36,237 | 27.4 | +3.8 |
| | Unionist | Richard Luce | 24,553 | 18.6 | −5.2 |
| | Unionist | John Arthur Aiton | 20,443 | 15.4 | −4.9 |
| | Liberal | L. du Garde Peach | 11,317 | 8.6 | +2.0 |
| Turnout | Turnout | Turnout | 132,238 | 82.6 | −2.6 |
| Majority | Majority | Majority | 11,684 | 8.8 | N/A |
| | Labour gain from Unionist | Labour gain from Unionist | Swing | +4.5 | |
| | Labour hold | Labour hold | Swing | | |

### Elections in the 1930s

General election 1931: Derby (2 seats) :
| Party | Party | Candidate | Votes | % | ±% |
| | National Labour | Y J. H. Thomas | 49,257 | 36.4 | N/A |
| | Conservative | Y William Reid | 47,729 | 34.3 | +0.3 |
| | Labour | William Robert Raynes | 21,841 | 15.7 | −11.7 |
| | Labour | Walter Halls | 20,241 | 14.6 | −12.8 |
| Majority | Majority | Majority | 27,416 | 19.7 | +10.9 |
| Turnout | Turnout | Turnout | 139,068 | 84.5 | +1.9 |
| | National Labour hold | National Labour hold | Swing | | |
| | Conservative gain from Labour | Conservative gain from Labour | Swing | | |
General election 1935: Derby (2 seats) :
| Party | Party | Candidate | Votes | % |
| | Conservative | Y William Reid | 37,707 | 30.19 |
| | National Labour | Y J. H. Thomas | 37,566 | 30.08 |
| | Labour | Herbert Arthur Hind | 25,037 | 20.04 |
| | Labour | Leonard John Barnes | 24,594 | 19.69 |
| Majority | Majority | Majority | 12,670 | 10.15 |
| Turnout | Turnout | Turnout | 124,904 | |
| | Conservative hold | Conservative hold | Swing | |
| | National Labour hold | National Labour hold | Swing | |
1936 Derby by-election :
| Party | Party | Candidate | Votes | % | ±% |
| | Labour | Philip Noel-Baker | 28,419 | 52.5 | +12.8 |
| | National Labour | Archibald Church | 25,666 | 47.5 | +17.4 |
| Majority | Majority | Majority | 2,753 | 5.0 | N/A |
| Turnout | Turnout | Turnout | 54,085 | 65.5 | |
| | Labour gain from National Labour | Labour gain from National Labour | Swing | | |

### Elections in the 1940s

General Election 1939–40:
Another General Election was required to take place before the end of 1940. The political parties had been making preparations for an election to take place in Autumn 1939 and by then, the following candidates had been selected;
* Labour: Philip Noel-Baker and A E Hunter
* Conservative: P C Cooper-Parry
* National Labour: Archibald Church
General election 1945: Derby (2 seats) :
| Party | Party | Candidate | Votes | % | ±% |
| | Labour | Y Philip Noel-Baker | 42,196 | 33.60 | |
| | Labour | Y Clifford Wilcock | 40,800 | 32.49 | |
| | Conservative | Francis Lochrane | 21,460 | 17.09 | |
| | Conservative | Max Bemrose | 21,125 | 16.82 | |
| Majority | Majority | Majority | 19,340 | 16.51 | N/A |
| Turnout | Turnout | Turnout | 125,581 | 76.39 | |
| | Labour gain from Conservative | Labour gain from Conservative | Swing | | |
| | Labour hold | Labour hold | Swing | | |