Whitchurch & Tongwynlais (Welsh: Yr Eglwys Newydd a Thongwynlais) is an electoral ward of Cardiff, Wales.

It covers some or all of the following areas: Coryton, Tongwynlais and Whitchurch in the parliamentary constituency of Cardiff North.

It is bounded by Caerphilly county borough to the north; Rhiwbina and Heath to the east; Llandaff North to the south; Radyr & Morganstown and Pentyrch to the west.

Whitchurch & Tongwynlais is in the Cardiff North constituency for the Senedd.

Since 2011 it has been represented by Julie Morgan MS, a member of the Labour Party The Westminster constituency of Cardiff North was represented by the Conservative Party's Craig Williams MP until the 2017 election, when Labour's Anna McMorrin won the seat.