CF 3

Cardiff is the capital and largest city of Wales, with a population of 383,919 in 2024.

The locality is described as a hamlet within the city of Newport, South Wales, indicating a small, close‑knit community setting.

Llanrumney is a suburb and community in east Cardiff, Wales, offering a residential setting within the city’s eastern area.

Marshfield is a small village and community within Newport, Wales, located about 5 miles southwest of Newport and 7 miles northeast of Cardiff. It offers a quiet, green‑belt setting with essential local amenities such as a village hall, post office and chemist, while bus services link residents to both cities.

Michaelston‑y‑Fedw is a small rural village with a close‑knit community, located within the CF3 postal district near Newport, Cardiff and Caerphilly.

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.

Peterstone Wentlooge is a small village situated to the south‑west of Newport, South Wales, with a modest population of 737 as of 2011. The area offers a quiet, rural setting within the Marshfield ward of Newport.

Rumney is a district and community in Cardiff, Wales, situated east of the Rhymney River. Historically part of Monmouthshire, it became incorporated into Cardiff in 1938.

St Mellons is a district and suburb of eastern Cardiff, Wales, with a mix of historic village areas and newer housing and business parks. It has a distinct community feel while being part of the capital city.