Old St Mellons is a village and community on the eastern edge of Cardiff, situated east of the Rhymney River. It lies within the historic county of Monmouthshire and is separated from the modern St Mellons suburb by the Newport Road.
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CF3 5SW
District: CF 3
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Old St Mellons is a village and community on the eastern edge of Cardiff, Wales. It lies east of the Rhymney River and forms part of the historic county of Monmouthshire. The locality is separated from the modern St Mellons suburb by the main road to Newport – the Newport Road (B4487) – which was formerly the A48 road. The area carries the postal district CF 3. The settlement is described as a village and community, suggesting a small, close‑knit environment within the wider Cardiff area. The presence of a historic county designation and a distinct main road boundary indicates a clear separation from the adjacent suburb, hinting at a distinct local character for residents and visitors alike.