Penylan is a district and community in the east of Cardiff, the capital city of Wales, known for its Edwardian era period houses and spacious tree lined roads and avenues.

Situated to both the north and south of the A48 dual carriageway, it is one of the most affluent districts of Cardiff,[citation needed] although subdivision of the large Victorian period properties is starting to occur in the areas at the south end of the ward, mimicking the trend in neighbouring Plasnewydd.

[1] Penylan is both an electoral ward, and a community of the City of Cardiff.

The electoral ward of Penylan falls within the parliamentary constituency of Cardiff East.

It is bounded by the wards of Cyncoed to the northwest; Pentwyn to the north; Llanrumney to the northeast; Rumney to the east; Splott to the southeast; Adamsdown to the south; and Plasnewydd to the southwest.