A folly tower is a tower that has been built as an architectural folly, that is, constructed for ornamental rather than practical reasons.Folly towers are common in Great Britain and Ireland, and often do have some practical value as landmarks, or as viewpoints, unlike other types of folly.
| 1827 | built by owner as a library and retreat | |||
| 19th century | ||||
| 1927 | built as a job creation scheme | |||
| 1781 | ||||
| 1794 | ||||
| 1848 | ||||
| Co. Galway | c.1800-1840 | Formerly part of Castleboy country house | ||
| Charborough Tower | Charborough Park | Dorset | 1790 | |
| 1830 | used as an observatory | |||
| 1775 | ||||
| 1860s | ||||
| 1746 | built to commemorate Cumberland's victory in the Battle of Culloden | |||
| 1935 | ||||
| 1838 | ||||
| 1775 | ||||
| –17th century | ||||
| 1838 | ||||
| 1856 | ||||
| 1760s | built to commemorate the end of the Seven Years' War and accession of George III | |||
| 1876 | built as a job creation scheme | |||
| possibly built as a landmark for smugglers | ||||
| 1821 | ||||
| 1800s | ||||
| Penny Tower | 1822 | built as a relief work during the Irish Famine, for which workers were paid a penny a day | ||
| 1758 | ||||
| 1760s | built as an observatory | |||
| County Cork, Ireland | named for actress Sarah Siddons | |||
| 1789 | served as a weather station | |||
| 1860 | ||||
| 1865 | ||||
| 1875 | served as a factory chimney | |||
| 1895 | not completed | |||
| 1789 | built as a belvedere, also served as a dovecote | |||