- Westgate Street KM
- Westgate Street KN
- Westgate Street KP
- Westminster Crescent
- Westminster Drive
- Westminster Drive (1)
- Whitaker Road
- Whitchurch (Cardiff)
- Whitchurch Hospital
- Whitchurch Hospital (1)
- Whitchurch Library
- Whitchurch Library (1)
- Whitchurch Library (2)
- Whitchurch Library (3)
- White Lodge
- Whitland Close
- Whitland Close (1)
- Wild Gardens Rd
- Wild Gardens Rd (1)
- Wilfred Brook House
- Wilfred Brook House (1)
- Willowbrook Drive
- Willowbrook Drive (1)
- Willowbrook School
- Willowdale Road
- Willowdene Way
- Willows Avenue
- Willows Avenue (1)
- Willows Avenue (2)
- Wilson Road
- Wilson Road (1)
- Wilson Road (2)
- Windway Road
- Windway Road (1)
- Wingfield Rd
- Wingfield Rd (1)
- Witla Court
- Wolf's Castle
- Wolf's Castle (1)
- Wolf's Castle Avenue
- Wolf`s Castle Avenue
- Wood Street JA
- Wood Street JB
- Wood Street JR
- Wood Street Ja
- Woodfield Avenue
- Woodside Court
- Woodville Road
- Woodville Road (1)
- Woolaston Ave
- Woolaston Ave (1)
- Worle Avenue
- Worle Avenue (1)
- Wyevale Garden Centre
- Wyevale Garden Centre (1)
- Wyndham Arcade Stop JE
- Wyndham Arcade Stop Je
- Wyndham Crescent
- Wyndham Crescent (1)
- Wyndham Crescent (2)
- Wyndham Crescent (3)
- Wyndham Road
- Wyndham Street
- Wyndham Street (1)
- Wynford Hotel
- Wynford Hotel (1)
- Wynnstay Close
- Ynys Bridge
- Ynys Bridge (1)
- Ynys Bridge (2)
- Ynys Bridge (3)
- Ynys Bridge (4)
- Ynys Bridge East
- Ynys Bridge East (1)
- Youghal Close
- Youghal Close (1)
- Ysgol Bro Edern
- Ysgol Bro Edern (1)
- Ysgol Glantaf
- Ystrad Street