House of Lords – Members with Over 40 Years of Service
The below are those members of the House of Lords with 40 or more years of service, with this list last being updated in November 2022. Only Baroness Gardner of Parkes and Baroness Masham of Ilton are Life Peers.
| The Earl of Shrewsbury | Shrewsbury, E. | 69 | Male | Conservative |
| Baroness Gardner of Parkes | Gardner of Parkes, B. | 95 | Female | Conservative |
| The Earl of Rosslyn | Rosslyn, E. | 64 | Male | Crossbench |
| The Earl of Courtown | Courtown, E. | 68 | Male | Conservative |
| Lord St John of Bletso | St John of Bletso, L. | 65 | Male | Crossbench |
| Lord Henley | Henley, L. | 68 | Male | Conservative |
| The Earl of Erroll | Erroll, E. | 74 | Male | Crossbench |
| Lord Glenarthur | Glenarthur, L. | 78 | Male | Conservative |
| Lord Crathorne | Crathorne, L. | 83 | Male | Conservative |
| Lord Greenway | Greenway, L. | 81 | Male | Crossbench |
| Lord Geddes | Geddes, L. | 85 | Male | Conservative |
| Viscount Craigavon | Craigavon, V. | 78 | Male | Crossbench |
| Viscount Astor | Astor, V. | 70 | Male | Conservative |
| Earl Peel | Peel, E. | 75 | Male | Crossbench |
| The Earl of Caithness | Caithness, E. | 73 | Male | Conservative |
| Baroness Masham of Ilton | Masham of Ilton, B. | 87 | Female | Crossbench |
| The Earl of Liverpool | Liverpool, E. | 77 | Male | Conservative |
| Lord Brougham and Vaux | Brougham and Vaux, L. | 84 | Male | Conservative |
| Lord Hylton | Hylton, L. | 90 | Male | Crossbench |
| Lord Trefgarne | Trefgarne, L. | 81 | Male | Conservative |
