1927 in Wales

Incumbents

February 4 At Pendine Sands, Sir Malcolm Campbell sets a new world land speed record of 174.88.
March 3 - J. G. Parry-Thomas is killed at Pendine, attempting to break Campbell's record.
The last horse-drawn tram service in the mainland UK, between Pwllheli and Llanbedrog, operates for the last time.
The highest railway in the British Isles is constructed at the Grwyne Fawr reservoir in Powys.

The first-ever radio commentary on a team game in the UK is given during the England v Wales rugby union international at Twickenham.

The Welsh Baseball Union is founded.
Boxing - Frank Moody wins the British lightweight and middleweight titles.
Football - For the only time in its history, the FA Cup is won by a non-English team -- Cardiff City F.C., who defeat Arsenal 1-0 in the first broadcast final.

January 12 - Richard Bebb, actor (d. 2006)
February 8 - Sir Stanley Baker, actor (d. 1976)
September 20 - Rachel Roberts, actress (d. 1980)
date unknown
- Tommy Harris, rugby player (d. 2006)
- Eddie Thomas, boxing champion and manager
- John Tripp, poet (d. 1986)

March 3 - J. G. Parry-Thomas, engineer and racing driver (b. 1884)
May 10 - Francis Edwards, politician (b. 1852)
June 22 - Ralph Champneys Williams, colonial governor (b. 1848)
July 29 - Freddie Welsh (Frederick Hall Thomas), boxer (b. 1886)
November 4 - Beriah Gwynfe Evans, author (b. 1848)
December 14 - Alfred Thomas, 1st Baron Pontypridd
date unknown
- Frances Hoggan, first woman doctor
- Isambard Owen, educationist
- William J Parry, author and MP