1740s in Wales
| 1730s | 1750s | Other years in Wales | 
| Other events of the decade | 
This article is about the particular significance of the decade 1740–1749 to Wales and its people.
Events
- 1740 in Wales
 - 1741 in Wales
 - 1742 in Wales
 - 1743 in Wales
 - 1744 in Wales
 - 1745 in Wales
 - 1746 in Wales
 - 1747 in Wales
 - 1748 in Wales
 - 1749 in Wales
 
Arts and literature
New books
1740
- John Dyer - The Ruins of Rome
 - Griffith Jones (Llanddowror) - Welsh Piety
 - Zachariah Williams - The Mariners Compass Completed
 
1742
1744
- Jane Brereton - Poems on several occasions (posthumously published)
 
1746
- Anna Williams - Life of the Emperor Julian (translation from the French)
 
1749
- Zachariah Williams - A True Narrative of certain Circumstances relating to Zachariah Williams in the Charterhouse
 
Music
1740
- Howell Harris - Llyfr o Hymneu o Waith Amryw Awdwyr (collection of hymns)
 
1742
- Howell Harris & Daniel Rowland - Sail, Dibenion, a Rheolau'r Societies (collection of hymns)
 
1744
- William Williams Pantycelyn - Aleluia (hymns: first part)
 
Births
1740
- date unknown - Sir Watkin Lewes, politician (d. 1821)
 
1741
- January 16 - Hester Thrale, diarist and friend of Dr Johnson (d. 1821)
 - August 20 - Henry Herbert, 1st Earl of Carnarvon (d. 1811)
 - September 3 - Owen Jones, antiquary (d. 1814)
 
1742
- September 26 - Thomas Jones, landscape painter (d. 1803)
 - December 3 - Sir Erasmus Gower, naval commander (d. 1814)
 
1745
- February 14 - David Davis (Castellhywel), poet (d. 1827)
 
1746
- September 28 - William Jones, philologist (d. 1794)
 
1747
- January - Richard Fenton, poet and author (d. 1821)
 
1748
- September 1 - Thomas Johnes, landowner (d. 1816)
 
1749
- September 23 - Sir Watkin Williams-Wynn, 4th Baronet, politician (d. 1789)
 
Deaths
1740
- August 7 - Jane Brereton, poet, 55
 - October 20 - Sir William Williams, 2nd Baronet, of Gray's Inn, politician, 75?
 
1741
- August - David Owen, 29 ("David of the White Rock"), harpist,
 - date unknown 
- Wil Hopcyn, poet, 41?
 - Robert Roberts, theologian, 61?
 
 
1743
- July 15 - John Wynne, bishop, 83?
 - date unknown 
- Thomas Morgan, Deist theologian
 - Robert Wynne, clergyman and academic
 
 
1744
- March 2 - William Maxwell, 5th Earl of Nithsdale, Jacobite, husband of Winifred Herbert
 
1745
- May 7 - Sir Thomas Hanmer, politician and literary editor, 68
 
1746
- May 21 - Lewis Morris, Welsh-descended Governor of New Jersey, 74
 
1748
1749
- May - Winifred Herbert, Countess of Nithsdale, 58?
 - August - Angharad James, poet, 72
 - September 26 - Sir Watkin Williams-Wynn, 3rd Baronet, 57