- Wessex St
- Western Avenue
- Western Avenue (1)
- Western Cemetery
- Western Cemetery (1)
- Western Drive
- Westfield Road
- Westminster Crescent
- Westminster Drive
- Westminster Drive (1)
- Whitchurch (Cardiff)
- Whitchurch Hospital
- Whitchurch Hospital (1)
- Whitchurch Library
- Whitchurch Library (1)
- Whitchurch Library (2)
- Whitchurch Library (3)
- White Bridge
- White Bridge (1)
- White Lodge
- Whitland Close
- Whitland Close (1)
- Wild Gardens Rd
- Wild Gardens Rd (1)
- Willowdale Road
- Wilson Road
- Wilson Road (1)
- Wilson Road (2)
- Windway Road
- Windway Road (1)
- Wingfield Rd
- Wingfield Rd (1)
- Wolf's Castle
- Wolf's Castle (1)
- Wolf's Castle Avenue
- Wolf`s Castle Avenue
- Woodfield Avenue
- Woodside Court
- Woodville Road
- Woodville Road (1)
- Woolaston Ave
- Woolaston Ave (1)
- Worle Avenue
- Wyndham Street
- Wyndham Street (1)
- Ynys Bridge
- Ynys Bridge (1)
- Ynys Bridge (2)
- Ynys Bridge (3)
- Ynys Bridge (4)
- Ynys Bridge East
- Ynys Bridge East (1)
- Ysgol Bro Edern
- Ysgol Bro Edern (1)
- Ysgol Glantaf