Castell-mawr, Isle of Anglesey

• Parish/Community: Llanfair-Mathafarn-Eithaf
• Unitary Authority: Isle of Anglesey
• Region: Wales

• Category: Geographic Feature
• Type: Hill or Mountain

• Latitude/Longitude: 53°18'43"N 4°12'50"W
• Eastings/Northings: 252603, 381745
• OS Grid: SH526817
• Mapcode Local: GBR HMZY.DHL
• Mapcode Global: WH53T.70MP

Location and coordinates are for the approximate centre of Castell-mawr within this administrative area. Geographic features and populated places may cross administrative borders.