how big is anglesey

Anglesey is about 712 km² (275 square miles) in area, making it the largest island in Wales and one of the bigger islands in Britain.

How big is Anglesey?

• In square kilometres : roughly 712 km².

• In square miles : about 275–276 sq mi , depending on whether you include Holy Island and minor in‑between bits.

• It is the largest island in Wales and the Irish Sea , and usually ranked fifth or seventh largest island in Britain , depending on how you count the county versus the island alone.

Size in context

• Anglesey is smaller than the Isle of Wight and the Isle of Man , but larger than many other UK islands such as Skye or Mull.

• Its coastline is around 125 miles (201 km) , with much of it protected as an Area of Outstanding Natural Beauty (AONB).

Quick size‑reference table

Measure| Value (approx.)
---|---
Area (km²)| 712 km² 13
Area (square miles)| 275–276 sq mi 19
Rank in Wales| Largest island 17
Rank in Britain| 5th–7th largest island 579

Information gathered from public forums or data available on the internet and portrayed here.