Sport
- Athletics - The first UK championships are held at Cwmbran.
- Billiards - Clive Everton reaches the semi-finals of the World Championship.
- Boxing - Johnny Owen wins the British bantamweight title.
- Darts - Wales wins the Home International Series and the first Darts World Cup.
- Fencing - Wales wins the Quadrangular Tournament.
- Rugby union - Wales win the Triple Crown.
- Long-distance swimming - David Jones of Port Talbot becomes the first Welshman to swim the Bristol Channel.
- Formation of the Welsh Hang Gliding Association and the Welsh Federation of Coarse Anglers.
Read more about this topic: 1977 In Wales